a formal dance, especially one held by a high school or college class at the end of an academic year.

Origin of prom

1890–95, Americanism; short for promenade



noun Computers.

a memory chip whose contents can be programmed by a user or manufacturer for a specific purpose.
Compare EPROM.

Origin of PROM

p(rogrammable) r(ead)-o(nly) m(emory)

prom. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for prom

gala, promenade, dance

Examples from the Web for prom

Contemporary Examples of prom

Historical Examples of prom

  • Ashley Dwight had been up307 to see her twice since the prom.

    Betty Wales Senior

    Margaret Warde

  • Twenty-four dances to fill, and the Prom only two weeks off!

    The Eternal Boy

    Owen Johnson

  • I'm filling up a girl's card for the Prom, and I want you to help me out.

    The Eternal Boy

    Owen Johnson

  • It's a week since Prom, and I haven't had a line from Cynthia.

    The Plastic Age

    Percy Marks

  • Prom his accustomed chair, the King could see this painting.

    In The Palace Of The King

    F. Marion Crawford

British Dictionary definitions for prom



US and Canadian informal short for promenade (def. 3)


n acronym for computing

programmable read only memory
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for prom

"student formal dance in celebration of graduation," 1894, American English shortened form of promenade (n.). Prom dress attested from 1975.

Online Etymology Dictionary, © 2010 Douglas Harper