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

 

basil

 noun
noun
BrE BrE//ˈbæzl//
 
; NAmE NAmE//ˈbæzl//
 
, also NAmE//ˈbeɪzl//
 
[uncountable] Herbs and spices
 
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a plant with shiny green leaves that smell sweet and are used in cooking as a herb See related entries: Herbs and spices Word Origin late Middle English: from Old French basile, via medieval Latin from Greek basilikon, neuter of basilikos ‘royal’, from basileus ‘king’.
See the Oxford Advanced American Dictionary entry: basil