Definition of baby bump noun from the Oxford Advanced Learner's Dictionary

 

baby bump

 noun
noun
BrE BrE//ˈbeɪbi bʌmp//
 
; NAmE NAmE//ˈbeɪbi bʌmp//
 
 
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the round shape of a woman’s stomach when she is pregnant You could see her baby bump, even though she was only two months pregnant.