Ammunition, bullet: Preparing and arming oneself. Having the wrong ammunition may denotes ineffectiveness or using the wrong tool/method to do certain things.

Argument or quarrels: Possibly signifying internal conflicts.

Aries: Meeting someone in the dream who is born under this sign  represents an aspect of self displaying the qualities associated with the  sign. Aries are often assertive, aggressive, reckless, energetic, pioneering,  brave, confident, selfish, quick to anger, impatient.

Armour: 1.  Putting on a false front.  2. Associated with protection and being defensive.

Artist: Possible denote the creative aspect of oneself.

Aborigine: 1. Possibly an aspect of self that is not accustomed to conventional or modern social norms. 2. Perhaps an aspect of self that is attuned to the nature.

Abortion: 1. Dropping a development or direction.
2. Losing or casting away a relationship.
3. Related to an actual event (of abortion).

Abyss: Associated with the feeling of lose of control. However, if no fear was experienced during the dream, then it could symbolise the entering into new experiences and uncharted waters.

Act, on screen, theatre, actor: 1. May mean putting on a false facade and not being true to oneself.
2. Spiritual it could be referring to life as a cosmic gameplay.

Alien: Something that is alien or new. Seeing an alien could indicate that you are undergoing a transformation and the new you may not be understandable to the current you.