- 1(of people or their actions) doing something that may not be sensible without first thinking about the possible results; done in this way synonym impulsive, reckless
- 2 a rash young man rash (to do something) It would be rash to assume that everyone will agree with you on this. Think twice before doing anything rash. This is what happens when you make rash decisions.
- adverb She had rashly promised to lend him the money. I see now that I may have acted rashly.
- noun [uncountable] He bitterly regretted his rashness.
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