Definition of birthmark noun from the Oxford Advanced Learner's Dictionary

 

birthmark

 noun
noun
BrE BrE//ˈbɜːθmɑːk//
 
; NAmE NAmE//ˈbɜːrθmɑːrk//
 
Skin
 
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a red or brown mark on a person’s skin that has been there since they were born See related entries: Skin
See the Oxford Advanced American Dictionary entry: birthmark