To dream that you are rejecting something indicates that there is some aspect of your life that you want to be rid of. It may be some failing situation. Alternatively, you are refusing to accept a situation that is being imposed and forced upon you.
To dream that you are being rejected signifies a lack of self-worth. You feel alienated. Alternatively, the dream means that you are being too agreeable and accommodating, where your own sense of self is lost. You need to be more assertive and learn to say no to others. If you are being rejected by a lover, then it suggests that you are you are rejecting some part of your own character.
Dreaming that you are rejected for a job implies a lack of self-esteem. You don’t believe in yourself and don’t feel you have something to offer.