C2careless or unwise, without thought for what might happen or result: That was a rash decision - you didn't think about the costs involved.[+ to infinitive]I think it was a bit rash of them to get married when they'd only known each other for a few weeks.Doing things without fear or proper thoughtrashly
/ˈræʃ.li/adverbDoing things without fear or proper thoughtrashness
/ˈræʃ.nəs/noun[U]›In a moment of rashness, I agreed to do a parachute jump for charity.Doing things without fear or proper thought