mistress of ceremonies

Noun

mistress of ceremonies (plural mistresses of ceremonies)

1. (dated) A woman who acts as a host at a formal event.
   • “In that case, sir,” she rejoined, “as my kinsman’s politeness seems to be still slumbering, you will permit me (though I suppose it is highly improper) to stand mistress of ceremonies, and to present to you young Squire Thorncliff Osbaldistone, your cousin,[…]”1817 December 31 (indicated as 1818), [Walter Scott], chapter V, in Rob Roy. […], volume I, Edinburgh: […] James Ballantyne and Co. for Archibald Constable and Co. […]; London: Longman, Hurst, Rees...
   • At this moment, Eva came up in her authoritative way as mistress of ceremonies, took Mr. St. John by the arm, and, walking across with him, seated him by Sibyl Selwyn, introduced them to each other, and left them.1873, Harriet Beecher Stowe, We and Our Neighbors, Boston: Houghton Mifflin, Chapter , p. 186
2. A woman who conducts a programme of varied entertainment, for example by introducing performers to the audience.
   • The mistress of ceremonies, a local poetess named Alicia Larralde de Ferrero, did not observe that more than a dozen uninvited guests had joined the audience.1950 January 23, “Spanish Omelet”, in Time
   • Her first real job in show business was as mistress of ceremonies at the Etoile music hall, in a revue that starred Mistinguett; she later said that it had taught her “to walk on stage”.2005 June 18, “Suzanne Flon”, in The Guardian