Defintion of babe, baby, infant. (n):
A very young child (birth to 1 year) who has not yet begun to walk or talk. "the baby began to cry again"; "she held the baby in her arms"; "it sounds simple, but when you have your own baby it is all so different".
Defintion of babe, baby, sister. (n):
(slang) sometimes used as a term of address for attractive young women.