Definition of du jour adjective from the Oxford Advanced American Dictionary

 

du jour

 adjective
adjective
NAmE//də ˈʒʊr//
 
, NAmE//duˈʒʊr//
 
, NAmE//də ˈʒər//
 
[after noun](informal)(humorous)
 
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very popular or important now This age group is the target group du jour. From French, meaning “of the day”.
See the Oxford Advanced Learner's Dictionary entry: du jour