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

 

frankincense

 noun
noun
BrE BrE//ˈfræŋkɪnsens//
 
; NAmE NAmE//ˈfræŋkɪnsens//
 
[uncountable]
 
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a substance that is burnt to give a pleasant smell, especially during religious ceremonies Word Origin late Middle English: from Old French franc encens, literally ‘high-quality incense’, from franc in an obsolete sense ‘superior, of high quality’ (which also existed in English) + encens ‘incense’.
See the Oxford Advanced American Dictionary entry: frankincense