I. hex /heks/ BrE AmE noun [countable]
American English an evil ↑ curse that brings trouble:
I think he’s trying to put a hex on me.
—hex verb [transitive]
II. hex ‧ a ‧ dec ‧ i ‧ mal /ˌheksəˈdesəm ə l◂, ˌheksəˈdesɪm ə l◂/ BrE AmE ( also hex ) adjective technical
[ Date: 1900-2000 ; Origin: hexa- 'six' (from Greek , from hex 'six' ) + decimal ]
hexadecimal numbers are based on the number 16 and are mainly used on computers