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

 

vegan

 noun
noun
BrE BrE//ˈviːɡən//
 
; NAmE NAmE//ˈviːɡən//
 
Diet
 
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a person who does not eat any animal products such as meat, milk or eggs. Some vegans do not use animal products such as silk or leather. He’s a strict vegan. See related entries: Diet Word Origin 1940s: from vegetarian + -an.
See the Oxford Advanced American Dictionary entry: vegan