Ladder
Ascension or dissension on a ladder may be an unconscious reflection of your movement toward a goal. Ascending is generally a more positive symbol than descending. The ladder is suggestive of hard work and exertion of energy. The ladder may also be symbolic of the "way to heaven". You can decide whether the heaven is here on earth or in the forever after! :) Missing rungs may symbolize missing elements or hardships and handicaps that you could be (or are) encountering on your ascent to better and bigger things.
Mystical Meaning - The Biblical story of Jacob's ladder is a symbol for the communication between the world and the spiritual realm. Similarly, in Mesopotamia the Ziggurat was named "the ladder to heaven/" In psychological terms this mystic symbolism can be understood as the communication between the true self and the ego. Consider this quote from Twitchell: "The higher one climbs on the spiritual ladder, the more he will grant others their own freedom and give less interference to another's state of consciousness."

Lake
All bodies of water generally represent our emotions and our unconscious. Old dream interpretation books say that lakes are associated with romantic feelings. If the lake is calm, your love life is probably in such good shape that you feel safe. Stormy water means to strap yourself in and get ready for a bumpy ride. If you see a monster in the water, your unconscious may be suggesting that you have competition (or some unseen issue or problem).
Mystical Meaning - In Japanese Zen Buddhism the lake is a symbol of the mind. If its surface is moving you cannot see the moon's reflection. However, if the lake is allowed to be still, the moon appears. So too the mind must become still if it is to perceive enlightenment.

Lamb
To interpret this dream most accurately, please consider all of the details in the dream and its mood. The lamb in your dream could have negative or positive connotations and it could reflect some of your personal characteristics or attributes. On the positive end, the lamb symbolizes gentleness, warmth, love, innocence, and for the spiritually-minded, the Lamb of God. More negative interpretations of this dream symbol would be that the lamb in your dream is a "sacrificial" lamb, or "lamb going to the slaughter".
Mystical Meaning - The sacrificial lamb of God takes away the sins of the world. In a psychological sense, this represents a desire to find forgiveness.

Lamp
Light offers guidance and reassurance and is a symbol of the spirit. Similarly, the lamp is a positive symbol that may represent the hopes and inspiration that drive you on through dark times. If your lamp goes out, it may be a symbol that you are overwhelmed by the unconscious. You have lost your ability to find your own way.
Mystical Meaning - The Hermit card from the Tarot pictures a wise old man carrying a lamp. Just like your dream, it advises you to carry your own spiritual light. It is a symbol of the wisdom that comes from free will and discrimination.

Lateness
If you are arriving late, your unconscious may be telling you to be more perceptive and to use more foresight when making plans. Lateness suggests that the dreamer may be feeling unprepared and distracted in a particular situation in daily life or in regard to long term goals.

Leading
If you dream of leading something, it shows you are taking control of factors in your life. What you are leading describes what you are taking control of. For example, if you dream of leading a dog, it may show that you are disciplining and controlling your sexual nature. If you are the one being led, consider what psychological factors you are following at the moment. Are you being led astray or toward something better?
Mystical Meaning - Your dream may represent your desires. Eastern traditions teach that a person led by desire will never achieve happiness. Only by becoming the master of yourself and placing a "ceiling on desire" can you realize your innate divinity.

Leak
Whether it is a leaky pipe or a bottle of soda, any type of a leak is usually a waste of energy and resources. If you are dreaming about leaks, you may want to consider where you are wasting energy and resources ( be it in your daily life, emotional life or thinking). Additionally, look carefully at the entire dream and see if information is being "leaked" from the unconscious to the conscious. The leaking water may represent emotions, thoughts, or insights entering slowly into the conscious experience of the dreamer.

Lecture
Your dream may be a continuation of your intellectual thinking and you are assimilating new knowledge that you learned during the day. However, the dream may be saying that you are becoming a bit of a bore by the way you lecture people in real life. You need to improve your communication skills. Don't be like Gladstone, a prime minister of Britain, about whom Queen Victoria complained: "[He] talks to me as if he is addressing a public meeting."
Mystical Meaning - An odd British superstition claims that if you dream of giving a lecture about a poet, all your wishes will come true.

Leech
Leeches are parasites that drain your energy and your resources. They are literally "blood suckers" and what they represent from your life is up to you to determine. Think about all of the draining things around you or inside of you. Usually dreams are designed to make us more aware of ourselves. Thus, the leeches may represent your own habits, thoughts, and negative emotions rather than someone in your environment. In the old days (and maybe in some remote parts of the world this is still happening) leeches were used for medical purposes. They were harvested and used in case of infection or other physical condition where by poisonous or harmful substance needed to be removed form the body. Maybe the leeches in your dream are there to suck out all of the negativity that you acquire throughout your day or in a particular situation.

Left
The right hemisphere of the brain controls the left side of the body. This part of the brain is instinctive, artistic, and intuitive. The left side of the body therefore represents these qualities.
Mystical Meaning - It was once believed that the Devil stood on the left, promoting a person to do wrong.

Legs
Legs represent your ability to progress. If they are strong, it shows your self-confidence, but if they are weak, you may feel emotionally unsteady at the moment.
Mystical Meaning - According to dream lore, if you dream of having a wooden leg you will have many new worries. Fortunately, this is a very rare dream.

Letter
Dreaming about receiving letters, just as in daily life, usually represents receiving news, information, or messages from someone specific, from your unconscious, or from the world at large. If you look forward to mail, this dream may have positive connotations for you. However, if you dread the envelops which typically hold the monthly bills, then this dream may have negative and anxiety provoking meaning. Typically, however, dreaming about receiving letters has positive and, at times, spiritual connotations. You may be coming into greater awareness about some aspect of your life, having new realizations, increasing self- understanding, or getting to the truth of things that concern you. Some believe that seeing many unopened letters in your dreams may represent missed opportunities.
Mystical Meaning - Some say that dreams of letters foretell unexpected news, but others claim they prophesy a marriage.

Library
You may be trying to assimilate some new information or idea. A library is a place of learning and is generally a good dream image. It suggests that you may be close to solving a problem or discovering something new and exciting.
Mystcial Meaning - According to the wise women of yore, this dream predicts that you will deceive your friends.

Lift
A lift is coming up from a basement may show ideas arising from the unconscious. Going high in a lift may indicate a more elevated and detached viewpoint. You may be more rational, but be careful not to lose touch with your instinct and intuition.
Mystical Meaning - The ancient sages took the stairs. However, modern superstition claims that to dream of traveling in a lift means a success if it goes up, but disappointment if it goes down.

Light
Whether you are dreaming or awake, light is a very positive symbol. It represents enlightenment, lifting of shadow, the acquisition of understanding and knowledge, and a positive force. Depending on the details of the dream, you may give the light spiritual or physical meaning. For some, the light may represent a higher force or power, God's presence, or rays of His love and peace. Others may find this dream reassuring as it may represent a well-lit journey through life, or simply a solution to a current problem. Light always refers to consciousness.
Mystical Meaning - The light you see may have a deep, spiritual significance. It may represent your journey toward enlightenment or be a direct experience of the inner light described by mystics. The light may have religious associations with Christ, as the light of the world; the boundless light of the Buddha's Nirvana; or the "light of ten thousand suns," as described in the yoga sutras.

Lighthouse
The lighthouse symbolizes guidance. It helps you safely journey the stormy seas of the unconscious. Consider what it is that has helped you. Perhaps you have met someone in waking life who has guided you, or you have discovered a philosophy or religion to light your way and keep you from the rocks of despair.
Mystical Meaning - You will have many new opportunities to choose from, say the oracles.

Lightning
Lightning represents energy and a fantastic, altering force. It is generally a positive dream symbol which represents the dreamers "awakened" state of consciousness. At times, a sudden shift in awareness, or unpredictable news, may shock us and leave us feeling anxious. However, enlightenment of any kind has long term positive implications. When interpreting this dream, make attempts to connect it to important and highly charged events from your daily life which have suddenly occurred or come into your awareness.
Mystical Meaning - Gods of thunder and lightning have appeared in the earliest mythologies. Some authorities believe that these ancient gods were the original gods of Neolithic man preserved in the stories and legends that were passed on from generation to generation. Like many symvols in the archaic myths, lightning may be a sexual symbol. When lightning strikes the ground, it represents Mother Earth being impregnated by the sky god.

Lion
Carl Jung said that all wild animals indicate latent affects (feelings and emotions that we do not readily deal with). They are also symbolic of dangers (hurtful and negative things) being "swallowed" by the unconscious. The lion is a symbol of social distinction and leadership. The interpretation depends on the circumstances and the interactions with the lion.
Mystical Meaning - In the Tarot, the Lion is a symbol of strength that can be controlled by gentleness (symbolized by a woman dressed in white). Astrology says that Leo, the sign of the Lion, is gregarious and likes to be the center of attention. Perhaps your dream is saying that you are displaying these egocentric qualities.

Lips
In the pop culture lips are usually symbols of sexuality and sensuality. They are also symbols of communication. Old dream interpretation books say that if you see beautiful lips in your dreams, expect happy events to occur, but if you see ugly or deformed lips, look out for trouble! Who knows?

Loan
The dream may simply be about your money worries. This dream can also suggest that you draw to heavily upon your emotional resources. You may feel that you are too self-reliant and now you need a little help and support from your friends.
Mystical Meaning - A quaint old English superstition claims that if you dream of laughing while returning a loan, you will attract great good luck.

Lock
If things are locked up and we don't have the key, then it is impossible for us to get to it. Consider the details in your dream and try to decipher the message. Are you the one that is locked up inside, or are opportunities closed to you? Locks in your dreams may represent those things that are currently inaccessible to you. Other interpretations suggest that locks are symbols of security and, at times, may have sexual connotations.

Lost
According to some psychologists, dreams about being lost frequently symbolize the beginning of a new phase of life and express the anxiety of leaving behind to familiar. Your dream may also express your worries about having no direction to your life. At times like this, it is wise to make a simple written list of the things that you want to achieve in life. Set yourself an attainable goal; set a deadline; and go for it! If you dream of losing something ask yourself what it symbolizes about yourself. For example, if you dream of losing money it may show that you feel you've lost your self-confidence or something you value about yourself.
Mystical Meaning - One dusty old dream book warns that to dream of losing something means you may cut yourself by accident.

Lottery
To dream of winning the lottery may be your way of having an inner holiday. For a few short hours, all your material troubles are over. However, keep a careful note of the numbers.
Mystical Meaning - Most of the superstitiona claim that it is unlucky to dream of the lottery.

Love
For most of us, love is a full-time obsession . We are concerned about the love of our parents, children, co-workers, friends, and many, many others. There is nothing more important to our emotional, psychological, or spiritual well-being than love. It is a vital part of any growth process. We need to have a healthy dose of self-love so that we can, in turn, love the world. Dreams may be filled with images of love, friendship, compassion, and lust. In the end, it is all about acceptance and belonging. To be loved is to feel accepted and have a sense of belonging. In our dreams we may be trying to figure out this mystery called love. The dream may be wish-fulfilling or compensatory in nature. It may be spiritual or practical, but always deals with a significant part of our psyche or our daily lives.

Luggage
Luggage may represent your responsibilities. It may also symbolize the worries, habits, and attitudes you carry around with you. Perhaps you should lighten your load and become a little more carefree. If you dream of giving your luggage to someone else, it may show you a need to delegate responsibility.
Mystical Meaning - You may have too many material possessions, desires, worries, and needs weighing you down and slowing your spiritual progress. Diminishing the luggage (shedding the desires) is Vairagya. If you lesson your desires, life's journey will be comfortable.