Puzzle - represents a mental challenge or a problem in your waking life that you need to solve.

Fog - represents not being able to see something, or a situation clearly.

Strangers - If these people are totally unrecognizable (they don't remind you of anyone you know)... they would represent different, and unknown, aspects of yourself. They are extensions and projections of your own subconscious, and personality. Alternately, a stranger may represent an unknown fear, or danger, you feel in your waking life.
Human beings (male and female alike), are curious, questioning, and have a need for information, and spiritual expansion. We all have masculine and feminine aspects (or sides) to our subconscious.
The masculine aspects would be the part of ourselves that we view as brave, strong, stubbornness, authoritative, logical...etc.
The feminine aspects would be the part of ourselves that we view as emotional, nurturing, tender, yielding, sensitive...etc.
When we dream, all the different parts of our 'inner selves' interact, and 'come alive', as though they were different people.

Black - the color of the subconscious, of sinking into the darkness, or mourning. Black is masculine; it is the color of night. Black stands for limitation, hidden things, despair, depression, things that are considered 'taboo', conservatism, old age, melancholy and sacrifice(the giving up of things to make you, or someone else happy), your shadow (an aspect of your personality that is hidden, unknown and/or repressed within your subconscious mind).

Flowers - represent growth, fulfillment, achievement of a goal; your true self (as in nature). A bouquet of flowers, represents respect, approval, admiration, and rewards.

Windows - represent your points of view, perspectives and glimpses of insight. Windows in our houses allow us to see the world on the out side, the windows in our dreams may encourage us to better see the world within ourselves, as well as the world outside. Looking out the window suggests you are, or need to be, aware of the world around you.

Dead body/bodies - Usually represents some area of your life that has 'died'. It can refer to the 'death' of feelings, such as hopelessness in connection with relationship and the loss of feelings about someone, the depression that follows big changes in life such as the loss of a loved one, loss of job, loss of a child-(poetically and physically), a sense your life in general is without the stimulus of motivation and satisfaction( as if you feel like your life is going nowhere). Also, repressed anger that is killing positive expression.
The dead person/people may link several of these feelings together, as symbols often represent large areas of experience. As such, the dead could represent part of yourself you want to leave behind, to 'die' out.

Laughing - symbolizes release of tension, an attempt to put others at ease, feeling embarrassed by some aspect of yourself, takings things lightly, attempt to hide the truth, also sometimes used to hide tears or sadness.

Rain - a symbol for the need of an emotional release.
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Is there some situation or emotion that is making you feel puzzled, or worried?
Have you been embarrassed recently?
Are you wishing you were younger and had less responsibility, and more 'playtime'?
Have you been feeling like you're having to sacrifice something to make others happy?
Is there something you wish would just go away, or something (a bad habit, bad experience) that you want to 'die off'?

Hope this helps, good luck!

You are quite welcome. Our subconscious mind always seems to know what's going on, but our conscious mind just doesn't want to 'see' it.

Hugs, hope & happiness,
J