Oxford Advanced American Dictionary

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

 Oxford3000

careless

adjective
careless pronunciation English ˈkeələs careless pronunciation American ˈkerləs
 
1 not giving enough attention and thought to what you are doing, so that you make mistakesIt was careless of me to leave the door open.Don't be so careless about/with spelling.a careless worker/driver
Opposite
careful2 resulting from a lack of attention and thoughta careless mistake/error3 careless of something (formal) not at all worried about somethingHe seemed careless of his own safety.4 not showing interest or effort
Synonym
casualShe gave a careless shrug.a careless laugh/smilecarelessly
carelessly pronunciation English ˈkeələsli carelessly pronunciation American ˈkerləsli
adverbSomeone had carelessly left a window open.She threw her coat carelessly onto the chair.‘I don't mind,’ he said carelessly. carelessness
carelessness pronunciation English ˈkeələsnəs carelessness pronunciation American ˈkerləsnəs
noun [uncountable]a moment of carelessness