adv. or adj. phr. 1. Not in agreement with a person's character or personality; not in the way that a person usually behaves or is expected to behave; not usual; unsuitable; uncharacteristic. Mary is a nice girl. Her fit of temper was out of character. 2. Not in character; unsuitable for a part or character. It isn't always out of character for a young actor to play an old man, if he is a good actor.
Antonym: IN CHARACTER.