Main definitions of mc in US English:

: mc1Mc2MC3



  • A miscarriage (particularly used in online forums)

    ‘I suffered a mc at 13 weeks last year’


1950s: abbreviation.

Main definitions of mc in US English:

: mc1Mc2MC3



  • Megacycle(s), a unit of frequency equal to one million cycles.

Main definitions of mc in US English:

: mc1Mc2MC3


nounPlural MCs

  • 1

    ‘the chance to vote for their MC’
  • 2

    chairperson, chairman, chairwoman, president, convener, spokesperson, spokesman, spokeswoman, leader, master of ceremonies, mistress of ceremonies
    View synonyms
  • 3A person who provides entertainment at a club or party by instructing the DJ and performing rap music.


[no object]
  • Perform as an MC.

    ‘he's MC'd at all of our parties’
    • ‘I was MC'ing for 20 bucks a night at the east side comedy club on Long Island, and I won, like, five weeks in a row.’
    • ‘It was MC'd by a DJ from a disco called ‘Carwash’ in Cyprus, but contained plenty of traditional Egyptian entertainment.’
    • ‘Among the many incidents recalled in his long and winding career is a night back in 1962 when he MC'd the first-ever British performance by the erstwhile Robert Zimmerman.’


  • 1(in the UK) Military Cross.

    ‘he was awarded the MC’
  • 2Music cassette.

    ‘it is now available on Deutsche Grammophon CD and MC’



/ˌem ˈsē//ˌɛm ˈsi/