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

 

henna

 noun
noun
BrE BrE//ˈhenə//
 
; NAmE NAmE//ˈhenə//
 
[uncountable] Hair products and accessories
 
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a reddish-brown dye (= a substance used to change the colour of something), used especially on the hair and skin See related entries: Hair products and accessories Word Origin early 17th cent.: from Arabic ḥinnā'.
See the Oxford Advanced American Dictionary entry: henna