em ‧ cee /ˌem ˈsiː/ BrE AmE noun [countable] American English
[ Date: 1900-2000 ; Origin: M. C. , short for master of ceremonies ]
(master of ceremonies) someone who introduces the performers on a television or radio programme or at a social event:
a game show emcee
—emcee verb [intransitive and transitive]