Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Suffering from lunacy; insane.
- adj. Of or for the insane.
- adj. Wildly or giddily foolish: a lunatic decision.
- adj. Characterized by lunacy or eccentricity.
Century Dictionary and Cyclopedia
- Moonstruck; affected by lunacy; periodically insane, with lucid intervals; crazy.
- Indicating lunacy; in the nature of lunacy.
- Of or like the moon.
- n. A person affected with lunacy; specifically, an insane person who has lucid intervals, or one whose unsoundness of mind is acquired, not congenital, as distinguished from an idiot.
- n. More generally (and in law), any person of unsound mind. See further under lunacy and insanity.
- n. Synonyms See insanity.
Wiktionary
GNU Webster's 1913
- adj. Affected by lunacy; insane; mad; crazy; demented.
- adj. Of or pertaining to, or suitable for, an insane person; evincing lunacy
- n. A person affected by lunacy; an insane person, esp. one who has lucid intervals; a madman; a person of unsound mind.
WordNet 3.0
- adj. insane and believed to be affected by the phases of the moon
- n. a reckless impetuous irresponsible person
- n. an insane person
Etymologies
- From Old French lunatique, from Late Latin lunaticus ("moonstruck"), derived from Latin luna ("moon"). (Wiktionary)
- Middle English lunatik, from Old French lunatique, from Latin lūnāticus, from lūna, moon; see leuk- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“_Another lunatic_, was the thought that flashed through my mind; another lunatic, the slave of a single idea.”
“Then there is the reference to the moon the term lunatic derives from luna, the Latin word for moon.”
“Vague recollections of Edgar Allan Poe and the works of Charles Reade had surrounded the term lunatic asylum with an atmosphere of feather beds and brutality; the word lunatic conjured up in his mind the idea of a man obviously insane.”
“I think being described as a lunatic is worthy of my wall of compliments”
“Ron Paul, the one the media and rabid neocons have called a lunatic, is the only sensible candidate in this race. michael”
Paul set to hold separate rally during Republican convention
“To forfeit liberties because of the lone act of a lunatic is an especially crude response to a simple, if immense, crime.”
“As a Viet Nam vet, I am outraged that this lunatic is allowed to smear veterans and other patriotic americans under your auspices.”
Think Progress » Coulter on Murtha: He Longs “To See U.S. Troops Shot, Humiliated”
“I smile as I say the word lunatic, hoping to cushion the remark.”
“Scotland's first minister, Alex Salmond, who is facing a difficult election next month, blamed the violence narrowly on what he called a "lunatic element," but Devine, the historian, sees a more sinister threat.”
“That's the religious philosophical basis for what I call the lunatic fringe.”
Lists
These user-created lists contain the word ‘lunatic’.
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GRE Barrons Wordlist
A complete Barron's Wordlist for GRE preparation. Your online flashcard replacement.
abase, abash, abate, abbreviate, abdicate, aberrant, aberration, abet, abeyance, abhor, abject, abjure and 4087 more...
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Muse's tacet ,to learn
Music brings silence's to raging thoughts and temperament , calm, as it is our object of definite purpose.
tacet, cadence, tempo, treble clef, penultimate, lexicon, origin, orchestra, kantele, magus, eros, coalesce and 248 more...
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lunacy
moon-related
moon dog, transient lunar p..., selenography, moonbow, paraselene, maria, parantiselene, moon, luna, trapper's moon, harvest moon, hunter's moon and 94 more...
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Bonkers
List for old and new terms and phrases meaning crazy, nuts, batty, prone to extreme nervousness, etc.
bonkers, crazy, nuts, batty, batchy, bats in the belfry, scatty, crackers, windy, gone crackers, cracked, dingo and 92 more...
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Words build meanings from origins( et...
These come from gamma meditation ,I think.
discursive, exogenous, machinations, purportedly, sumptuous, congruity, cantankerous, incongruous, festoon, hessian, ratiocinative, stratigraphic and 2046 more...
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Specifically
Being a list of words which have "specifically" in their definitions.
recompose, specifically, Dutch, abstinence, discipline, virtue, namely, opening, century, amalgamation, cup, second and 303 more...
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Mentally irregular
Words for the mentally irregular
bonkers, unhinged, batshit crazy, cognitive dissonance, apophenia, undone, loony, unsound, deranged, a bit off the beam, daft, stark ravin' mad and 65 more...
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big book gre
abase, abbess, abbey, abbot, abdicate, abdomen, abdominal, abduction, abed, aberration, abet, abeyance and 6691 more...
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Bonkers
crackers, barmy, half-baked, mental, unhinged, barking, cuckoo, cracked, nuts, mad, insane, touched and 24 more...
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Latin Spelling Bee List
need to know these words!!!!!!!!!!!!!!!!!
inane, ambivalent, incriminate, interrupt, amicable, meticulous, animosity, curriculum, electoral, transect, condolences, bugle and 132 more...
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ShuckFinn's Words
abecedarian, conflate, mondegreen, whit, truculent, downright, pugnacious, effluvium, canker, inveigle, obfuscate, melancholy and 227 more...
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BuffaloBen's Words
sycamore, wipfel, rohlingsspindel, gorgeous, flamboyance, anschmiegen, pengpeng, zuckerhut, revolver, troubleshooter, breeze, dandy and 228 more...
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cindywrites's Words
chiaroscuro, mollycoddle, feckless, evocative, provocative, invocation, beckon, allay, becalm, console, lull, soothe and 479 more...
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-ic ending
Words ending in ic, tic or nic.
clastic, elastic, caustic, spastic, frantic, lactic, moronic, ironic, panic, doric, diplomatic, bureaucratic and 202 more...
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dark and bright words of shine and fi...
scotophil, scotoma, scotia, shed, shadow, shade, scone, whiting, edelweiss, light, lightning, lucina and 349 more...
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gerwitz's Words
erudite, autodidactic, callipygian, ouroboros, zounds, fie, wabi, sabi, gedankenexperiment, zeitgeist, eliminativism, aether and 157 more...
Tweets
Looking for tweets for lunatic.

michaelt42 A Brief Biography of Joseph Priestly gives insight into lunatic: "While in Birmingham, Joseph Priestley became a member of the Lunar Society. This was an informal group that met monthly when the moon was full so that there would be light to drive home by. Naturally they were called, and called themselves,lunatics. The members were successful manufacturers and professional men who shared an interest in stimulating discussions on philosophy and science and almost any subject that was interesting. The participants included James Watt, Matthew Boulton, Erasmus Darwin, and others." From A Brief Biography of Joseph Priestley, Prepared by members and friends of the Unitiarian Universalist Congregation of the Susquehanna Valley (UUCSV), Northumberland, Pennsylvania (http://uucsv.org/priestl.htm)
Mar 19, 2012
mollusque . . . I perceived my entire skin as that of a leopard painted by a meticulous lunatic from a broken home.
--Vladimir Nabokov, 1974, Look at the Harlequins! p. 243 Jun 13, 2009