Pronunciation: (kâr"ful),[key] —adj. 1. cautious in one's actions: Be careful when you cross the street. 2. taking pains in one's work; exact; thorough: a careful typist. 3. (of things) done or performed with accuracy or caution: careful research. 4. solicitously mindful (usually fol. by of, about, or in): careful of the rights of others; careful about one's behavior; careful in speech. 5. Archaic. a. troubled.
b. attended with anxiety.