lunatic

L1U1N1A1T1I1C3
/ˈluːnətɪk//luːˈnætɪk/

noun

An insane person.

Less commonScrabble 9

Meanings

nounlunatic (plural lunatics)

plural lunatics · alternative obsolete lunatick

  1. An insane person.

    You may be right I may be crazy Oh, but it just may be a lunatic you're looking for

    1980 March 7, Billy Joel, “You May Be Right”, in Glass Houses
    1 more example

    While there are other races (or individuals—heaven forgive me, I am no ethnologist) who think you a criminal or a lunatic unless you carefully plod along from step to step like a hippopotamus out of water.

    1902, Hilaire Belloc, The Path to Rome

    Synonyms: moonling, basket case, basket weaver, crack, crackpot, crazy, crazyhead, dingbat

adjectivelunatic (comparative more lunatic, superlative most lunatic)

comparative more lunatic · superlative most lunatic · alternative obsolete lunatick

  1. literaryrareRelating to the Moon; lunar.

    As the narrator turns his attention to the moon itself and its Lunatic inhabitants, Heinsius seems to draw on the True History, but is still within the confines of the Icaromenippus.

    1996, Joel C. Relihan, “Menippus in Antiquity and the Renaissance”, in R. Bracht Branham, Marie-Odile Goulet-Cazé, editors, The Cynics: The Cynic Movement in Antiquity and Its Legacy, Berkeley, C.A. […]: University of California Press, →ISBN, page 269
    1 more example

    That or I might bounce off something I hit and head back out into space, become the light in the eye of some lunatic observer, looking up at the big blue ball and seeing me bang something in their retina.

    2020, Kim Stanley Robinson, chapter 53, in The Ministry for the Future, New York, N.Y.: Orbit Books, →ISBN, page 235
  2. literaryrareInfluenced or affected by the Moon.

    This I remember: she was false as the lunatic sea.

    1956 Summer, David R[ytman] Slavitt, “Partiti da Cotesti che son Morti”, in The Kenyon Review, volume XVIII, number 3, Gambier, O.H.: Kenyon College, →ISSN, →OCLC, page 370

Synonyms & antonyms

More synonyms by meaning

adjectiveinsane and believed to be affected by the phases of the moon

nounan insane person

Similar
Broader
sick persondiseased personsufferer

nouna reckless impetuous irresponsible person

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Latinluna“moon”
  2. Late Latinlunaticus“moonstruck”
  3. Old Frenchlunatique
  4. Middle Englishlunatik
  5. Englishlunatic

From Middle English lunatik, from Old French lunatique, from Late Latin lunaticus (“moonstruck”), derived from Latin luna (“moon”), the connection stemming from the belief that changes of the moon caused intermittent insanity.

Full word history & related roots →

Translations

Bulgarian луд, умопобъ́ркан
  • луд (lud)insane person
  • умопобъ́ркан (umopobắrkan)insane person
  • луд (lud)crazed
  • побъркан (pobărkan)crazed
Catalan llunàtic
  • llunàticcrazed
Chinese Mandarin 瘋子 /疯子, 狂人
  • 瘋子 /疯子 (fēngzi)insane person
  • 狂人 (kuángrén)insane person
Czech šílenec, blázen
  • šílenecinsane person
  • blázeninsane person
  • šílenýcrazed
  • bláznivýcrazed
Dutch gek, gekkin
  • gekinsane person
  • gekkininsane person
  • zotinsane person
  • zottininsane person
Esperanto lunatiko, lunatika
  • lunatikoinsane person
  • lunatikacrazed
Finnish hullu, kuuhullu
  • hulluinsane person
  • kuuhulluinsane person
  • mielipuoliinsane person
  • hullucrazed
French lunatique, dément
  • lunatiqueinsane person
  • démentinsane person
  • démenteinsane person
  • aliénéinsane person
  • aliénéeinsane person
  • déséquilibréinsane person
  • lunatiquecrazed
German Irre
  • Irreinsane person
Hebrew סַהֲרוּרִי
  • סַהֲרוּרִי (saharurí)crazed
Hungarian holdkóros, havas
  • holdkórosinsane person
  • havasinsane person
Icelandic brjálæðingur, geðsjúklingur
  • brjálæðingurinsane person
  • geðsjúklingurinsane person
Indonesian orang gila
  • orang gilainsane person
Irish gealt, gealtach
  • gealtinsane person
  • gealtachcrazed
  • gan chiallcrazed
Italian demente
  • dementeinsane person
Japanese 狂人, 気違い
  • 狂人 (kyōjin)insane person
  • 気違い (kichigai)insane person
Korean 광인, 미치광이
  • 광인 (gwang'in)insane person
  • 미치광이 (michigwang'i)insane person
Latin lunaticus
  • lunaticuscrazed
Malay orang gila
  • orang gilainsane person
Māori porowairangi
  • porowairangiinsane person
Polish wariat, szaleniec
  • wariatinsane person
  • szaleniecinsane person
Portuguese lunático, lunática
  • lunáticoinsane person
  • lunáticainsane person
  • lunáticocrazed
Romanian nebun, nebună
  • nebuninsane person
  • nebunăinsane person
Russian псих, душевнобольно́й
  • псих (psix)insane person
  • душевнобольно́й (duševnobolʹnój)insane person
  • сумасше́дший (sumasšédšij)insane person
  • поме́шанный (poméšannyj)insane person
  • чо́кнутый (čóknutyj)insane person
  • сумасше́дший (sumasšédšij)crazed
  • душевнобольно́й (duševnobolʹnój)crazed
  • поме́шанный (poméšannyj)crazed
  • чо́кнутый (čóknutyj)crazed
Slovak šialenec, blázon
  • šialenecinsane person
  • blázoninsane person
  • šialenýcrazed
  • bláznivýcrazed
Spanish insano, orate
  • insanoinsane person
  • orateinsane person
  • lunáticocrazed
Swedish galning, dåre
  • galninginsane person
  • dåreinsane person
  • knäppgökinsane person
Tagalog baliw, sira-ulo
  • baliwinsane person
  • sira-uloinsane person
Turkish deli
  • deliinsane person
Urdu دِیوانَہ, پاگَل
  • دِیوانَہ (dīvāna)insane person
  • پاگَل (pāgal)insane person
  • پَگْلا (paglā)insane person
Welsh lloerig, lloerig
  • lloeriginsane person
  • lloerigcrazed

Rhymes & wordplay

Anagrams

Cite this entry
APA

lunatic. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/lunatic

MLA

“lunatic.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/lunatic. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “lunatic,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/lunatic.

Source: lunatic on Wiktionary, CC BY-SA 4.0.