To dream that you are wearing lingerie, represents your sexual identity, body image and your self-esteem. You may finally be recognizing and acknowledging an aspect of yourself that was not previously expressed.
To dream that you are buying or shopping for lingerie, indicates that you are compensating for your inner feelings of emptiness. You may be trying to fulfill some sexual/emotional need. Alternatively, you may be seeking to change your image and attitude. You may feel one way on the inside but behave another way on the outside.
Please see also Underwear.