- 1not giving enough attention and thought to what you are doing, so that you make mistakes It was careless of me to leave the door open. Don't be so careless about/with spelling. a careless worker/driver opposite careful
- 2resulting from a lack of attention and thought a careless mistake/error
- 3 not showing interest or effort synonym casual She gave a careless shrug. a careless laugh/smile
adjectivejump to other results
carelesslyjump to other results
adverb Someone had carelessly left a window open. She threw her coat carelessly onto the chair. “Whatever,” he said carelessly.
carelessnessjump to other results
noun [uncountable] a moment of carelessness