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



BrE BrE//kræʃ//
; NAmE NAmE//kræʃ//
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[only before noun] involving hard work or a lot of effort over a short period of time in order to achieve quick results a crash course in computer programming a crash diet Word Originlate Middle English: imitative, perhaps partly suggested by craze and dash.
See the Oxford Advanced American Dictionary entry: crash