Definition of: problem

(prob′ləm) noun
1. A perplexing question demanding settlement, especially when difficult or uncertain of solution; also, any puzzling circumstance or person.
2. Math. A proposition in which some operation or construction is required, as to bisect an angle; anything proposed to be worked out. See synonyms under RIDDLE².
—adjective
1. Presenting and dealing with a problem, especially a moral, sociological, or emotional problem: problem drama.
2. Being a problem, especially in point of behavior, maladjustment, etc.: a problem child. [<L problema <Gk. problēma something thrown forward (for discussion) <pro- forward + ballein throw]