1.
( in some sports ) outside the area of play which is allowed :
His shot went out of bounds.
2.
( NAmE ) not reasonable or acceptable :
His demands were out of bounds.
OUT OF BOUNDS
Meaning of OUT OF BOUNDS in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005