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Related to loony: looney, loony bin
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or loon·ey also lun·y (lo͞o′nē)Informal
adj. loon·i·er, loon·i·est also lun·i·er or lun·i·est
1. Extremely foolish or silly.
2. Mentally deranged; crazy.
n. pl. loon·ies or loon·eys also lun·ies
A foolish or crazy person.

[Shortening and alteration of lunatic, or from loon.]

loon′i·ly adv.
loon′i·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈluːnɪ) ,




adj, loonier, looniest, lunier or luniest
1. lunatic; insane
2. foolish or ridiculous
n, pl loonies, looneys or lunies
a foolish or insane person
ˈlooniness, ˈluniness n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


or loon•ey

(ˈlu ni)

adj. -i•er, -i•est, adj.
1. lunatic; insane.
2. extremely or senselessly foolish.
3. a lunatic.
[1860–65; lun (atic) + -y2]
loon′i•ness, n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.loony - someone deranged and possibly dangerousloony - someone deranged and possibly dangerous
colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
lunatic, madman, maniac - an insane person
Adj.1.loony - informal or slang terms for mentally irregularloony - informal or slang terms for mentally irregular; "it used to drive my husband balmy"
insane - afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


1. Slang, insane, strange, mental (slang), mad, out there (slang), crazy (informal), nuts (slang), bananas (slang), barking (slang), raving, distracted, eccentric, frantic, frenzied, unstable, crackers (Brit. slang), batty (slang), crazed, lunatic, psychotic, demented, cuckoo (informal), unbalanced, barmy (slang), nutty (slang), deranged, delirious, rabid, bonkers (slang, chiefly Brit.), flaky (U.S. slang), unhinged, loopy (informal), crackpot (informal), out to lunch (informal), round the bend (Brit. slang), barking mad (slang), out of your mind, gonzo (slang), screwy (informal), doolally (slang), off your head (slang), off your trolley (slang), round the twist (Brit. slang), up the pole (informal), of unsound mind, as daft as a brush (informal, chiefly Brit.), lost your marbles (informal), not right in the head, non compos mentis (Latin), off your rocker (slang), not the full shilling (informal), off your nut (slang), off your chump (slang), wacko or whacko (informal) She's as loony as her brother!
1. (Slang) mad person, lunatic, nut (slang), psycho (slang), maniac, psychotic, madman, psychopath, nutter (Brit. slang), basket case (slang), nutcase (slang), madwoman, headcase (informal), mental case (slang), headbanger (informal) At first they all though I was a loony.
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002


or looney
also luny
2. Informal. Afflicted with or exhibiting irrationality and mental unsoundness:
Informal: bonkers, cracked, daffy, gaga.
Chiefly British: crackers.
Idioms: around the bend, crazy as a loon, mad as a hatter, not all there, nutty as a fruitcake, off one's head, off one's rocker, of unsound mind, out of one's mind, sick in the head, stark raving mad.
Informal. A person regarded as strange, eccentric, or crazy:
Informal: crank, loon.
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


A. ADJ (loonier (compar) (looniest (superl))) → loco, chiflado
B. Nloco/a m/f
C. CPD loony bin Nmanicomio m
the loony left N (Brit) (Pol) (pej) → la izquierda radical
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005


adjtimbré(e), cinglé(e) m/f
ntimbré(e) m/f, cinglé(e) m/floony bin nmaison f de fousloony left n (British) [Labour Party] the loony left l'aile extrémiste du parti travailliste
Collins English/French Electronic Resource. © HarperCollins Publishers 2005


adj (+er)bekloppt (inf)
nVerrückte(r) mf (inf), → Irre(r) mf


loony bin
n (inf)Klapsmühle f (inf)
loony left (Brit Pol) (pej inf)
n the loonydie radikale Linke
adj attrlinksradikal
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007


[ˈluːnɪ] adj & n (fam) → pazzo/a, matto/a
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in classic literature ?
The loony thing then betrayed me to another bounder who happened in, but I found a way out and up onto the roof where I have been for quite some time now waiting for a chance to get down into the street without being seen.
The rug you see draped over the bench in the corner was arranged to hide the blood stain--in some ways they are not so loony after all."
He was at the helm of the irreverent Monster Raving Loony Party, handing the Treasury thousands of pounds in deposits forfeited at innumerable election campaigns.
TWO brave young women took a dip in the Firth of Forth to celebrate the forthcoming Loony Dook.
He really is the most incorruptible MP and because of this he has been labelled a loony lefty.
When Peter Hain was put on the spot about his right of veto over legislative proposals coming from the National Assembly, he said he would only intervene when proposals were "loony".
AN old friend of Screaming Lord Sutch has left his party - because it's too loony.
Captain Beany - New Millennium Bean Party Guto Bebb - Conservative Reverend David Braid - Independent Leslie Edwards - Official Monster Raving Loony Party Bleddyn Hancock - Plaid Cymru Chris Herriot - Socialist Labour Jeff Hurford - Welsh Socialist Alliance Huw Irranca-Davies - Labour Jonathan Spink - Green Party Veronica Watkins - Liberal Democrats General Election June 2001 Sir Raymond Powell (Lab) 18,833 (-11.9%) Angela Pulman (PC) 4,259 (+7%) Ian Lewis (LibDem) 3,878 (+3.6%) Richard Hill (Con) 3,383 (+1.4%) Labour majority - 14,574 Turnout - 58.2% (14.9%) Assembly Member - Janice Gregory (Lab)
A Staffordshire town dubbed the craziest place in Britain is set to play a central role in the General Election battle - as the official headquarters of the Rock n Roll Loony Party.
A member of the Monster Raving Loony Party dressed as a banana had sneaked into the only confetti shot.
Connie's in the loony bin getting SHOCK treatment, and the crazy O'Rourkes, whose home IS a loony bin, get an even bigger shock when they find their new house isn't ready.
This vitality stems from the unusual compositional method: rather than choreographing the piece from start to finish, Taylor solicited chunks of material from six of the company's dancers that he then "amended and combined," as the program puts it, in addition to choosing the loony songs that accompany them--"Itsy Bitsy Teenie Weenie Yellow Polka Dot Bikini," "Does Your Chewing Gum Lose its Flavor (On the Bedpost Overnight)," and the like.