problem: Meaning and Definition of

prob•lem

1. any question or matter involving doubt, uncertainty, or difficulty.
2. a question proposed for solution or discussion.
3. a statement requiring a solution, usually by means of a mathematical operation or geometric construction.
4. (used as a conventional reply to a request or to express confirmation, affirmation, or gratitude).

1. difficult to train or guide; unruly: a problem child.
2. dealing with choices of action difficult either for an individual or for society at large: a problem play.