English

Definition of nonce adjective from the Oxford Advanced Learner's Dictionary

 

nonce

 adjective
adjective
BrE BrE//nɒns//
 
; NAmE NAmE//nɑːns//
 
 
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a nonce word or expression is one that is invented for one particular occasion Word Origin Middle English: from then anes ‘the one (purpose)’ (from then, obsolete oblique form of the + ane ‘one’ + -s), altered by wrong division; compare with newt and nickname.
See the Oxford Advanced American Dictionary entry: nonce