(~s)
Frequency: The word is one of the 3000 most common words in English.
A ~ of things is a mixture of them.
...a fantastic ~ of colours.
...the ~ of science and art.
N-COUNT: usu N of n
COMBINATION
Meaning of COMBINATION in English
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012