(~s)
A ~ is something friendly that you say or do when you meet someone.
They exchanged ~s...
He raised a hand in ~.
N-VAR
(~s)
A ~ is something friendly that you say or do when you meet someone.
They exchanged ~s...
He raised a hand in ~.
N-VAR
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012