MC /ˌem ˈsiː/ BrE AmE noun [countable]
1 . (Master of Ceremonies) someone who introduces guests or performers at a social or public occasion SYN emcee
2 . the person in a ↑ rap group who holds the ↑ microphone and says the words to the songs
3 . (Military Cross) a ↑ medal given to British army officers for being brave