To dream that you or others are adopting a child indicates that you are taking on something new and different. Ask yourself what is missing in your life that would make you happy.
If you dream that you are adopted (and you aren’t in real life), you are feeling out of place in some real-life situation. You may also suspect that those closest to you have been lying to you.
If you dream of giving up a baby for adoption, there is some aspect of yourself or your personal life that is changing, and you are feeling a sense of loss. You may have made a decision you can’t take back, or be sad or anxious about moving on to a new stage. You may also be having trouble making a new personal goal or project happen. Also see “Baby”... My Dream Interpretation
Taking on something foreign—giving aid. Longing for the “child within.” Here you should always ask what is missing that would make you happy. What would you like to take on?... Little Giant Encyclopedia
If you see yourself being adopted by a group or family, this means acceptance among the people pictured, or self-acceptance with regard to your perceived roles and responsibilities to that group.
Seeing yourself alone waiting for adoption is an alternative type of desertion dream. Alternatively, this reveals insecurity about not being accepted or loved, or feeling totally out of place in your surroundings.
What exactly is being adopted? This symbol can represent an aspect of yourself— an idea or a characteristic with which you’re becoming more accepting and comfortable, thereby adopting it into your being.... The Language of Dreams