1. a doll, esp. one resembling a human baby.
2. Often, baby dolls . Also called baby doll nightgown, baby doll pajamas . a garment for women or girls consisting of a hip-length top of delicate fabric often decorated with ruffles, ribbons, or lace, with a matching panty, worn for sleeping.
3. a short dress styled to resemble this.
Also, babydoll (for defs. 2, 3).
[ 1860-65 ]