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



BrE BrE//dʒæɡ//
; NAmE NAmE//dʒæɡ//
(informal, especially North American English)
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a short period of doing something or of behaving in a particular way, especially in a way that you cannot control a crying jag Word Originlate 16th cent. (originally meaning a bundle): of unknown origin. In the late 18th cent. the sense was ‘portion, quantity’, later ‘as much alcohol as one can hold’, hence ‘a binge’. The current sense dates from the early 20th cent.
See the Oxford Advanced American Dictionary entry: jag