Meaning of POCKET in English

POCKET

[adjective] [before noun; not gradable]If you describe something as pocket, it means that it is small enough to put in your pocket, or that you regularly carry it in your pocket.a pocket dictionarya pocket travel guidea pocket edition of a booka pocket diarya pocket calculatora pocket phonea pocket video gamea pocket watchPocket can also mean smaller than usual.a pocket battleship

Cambridge English vocab.      Кембриджский английский словарь.