Pronunciation: (kâr'lis),[key] —adj. 1. not paying enough attention to what one does: a careless typist. 2. not exact, accurate, or thorough: careless work. 3. done or said heedlessly or negligently; unconsidered: a careless remark. 4. not caring or troubling; having no care or concern; unconcerned (usually fol. by of, about, or in): careless of the rights of others; careless about one's behavior; careless in speech. 5. possessed or caused without effort or art; unstudied: careless beauty. 6. Archaic.free from anxiety.