(~s)
A ~ is the letters and numbers which identify a person, vehicle, or organization that is broadcasting on the radio or sending messages by radio.
N-COUNT
(~s)
A ~ is the letters and numbers which identify a person, vehicle, or organization that is broadcasting on the radio or sending messages by radio.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012