adjective, loon·i·er, loon·i·est, noun, plural loon·eys, loon·ies.




Canadian Informal. a dollar coin.
Also loony.

Origin of loonie

from the image of a loon on the reverse



or loon·ey, lun·y


adjective, loon·i·er, loon·i·est.

lunatic; insane.
extremely or senselessly foolish.

noun, plural loon·ies.

Origin of loony

First recorded in 1860–65; lun(atic) + -y2
Related formsloon·i·ness, noun



noun, plural loon·ies.

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

Examples from the Web for loonies

Contemporary Examples of loonies

  • And even if that did succeed, if the loonies want to replace Boehner with someone to his right, they need, again, 217 votes.

    The Daily Beast logo
    The Shutdown and Boehner’s Future

    Michael Tomasky

    October 1, 2013

  • At first, they were dismissed as a Postal Service problem, as if loonies had suddenly been recruited to work there.

    The Daily Beast logo
    Going Postal

    Mark Ames

    November 7, 2009

  • Today a new generation of loonies has taken over the asylum.

    The Daily Beast logo
    The Year in Palin

    The Daily Beast

    August 28, 2009

Historical Examples of loonies

  • I say, Reggie, old thing—present company excepted—have there been any loonies in your family?

British Dictionary definitions for loonies



Canadian slang
  1. a Canadian dollar coin with a loon bird on one of its faces
  2. the Canadian currency


looney or luny


adjective loonier, looniest, lunier or luniest

lunatic; insane
foolish or ridiculous

noun plural loonies, looneys or lunies

a foolish or insane person
Derived Formslooniness or luniness, noun
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 loonies



also loonie, looney, 1853, American English, short for lunatic, but also influenced by loon (n.2) and perhaps loon (n.1), the bird being noted for its wild cry and method of escaping from danger. As a noun by 1884, from the adjective. Slang loony bin "insane asylum" is from 1919. Looney left in reference to holders of political views felt to be left-wing in the extreme is from 1977. Looney Tunes, Warner Bros. studios' animated cartoon series, dates from 1930.

Online Etymology Dictionary, © 2010 Douglas Harper