lunacy

1 a foolish act or idea you want to sneak into the building after the alarm is set—what lunacy! Synonyms of lunacy absurdity, asininity, bêtise, fatuity, foolery, foppery, idiocy, imbecility, inanity, insanity, folly, stupidityWords Related to lunacy absurdness, craziness, foolishness, inaneness, madness, senselessness, witlessness; buffoonery, monkeyshine(s), shenanigan(s), tomfoolery; drivel, humbug, nonsense, twaddle; blunder, bungle, flub, goof, howlerNear Antonyms of lunacy discretion, forethought, prudence, sagacity, wisdom; brainstorm, inspiration

2 a serious mental disorder that prevents one from living a safe and normal life the judge ruled that the certified lunacy of the accused made him incompetent to stand trial Synonyms of lunacy aberration, dementia, derangement, insanity, madness, mania, rage [archaic]Words Related to lunacy neurosis, psychosis; instability, irrationality, unreasonableness; delirium, frenzy, hysteria; hallucinosis, hypomania, paranoia, schizophrenia; senile dementia; delusion, hallucination; monomania, obsession, phobia; abnormality, dementedness, unsoundnessNear Antonyms of lunacy lucidity, rationality, rationalness, reasonability, reasonableness; normality, soundnessAntonyms of lunacy mind, saneness, sanity

3 lack of good sense or judgment our friend's good-natured lunacy makes him of no use in an emergency but very entertaining companion nevertheless Synonyms of lunacy absurdity, asininity, balminess, brainlessness, craziness, daftness, dippiness, dottiness, fatuity, fatuousness, folly, imbecility, inanity, insanity, foolishness, madness, nonsensicalness, nuttiness, preposterousness, senselessness, silliness, simplicity, unwisdom, wackiness, witlessness, zaninessWords Related to lunacy denseness, dim-wittedness, doltishness, dopiness, dullness (also dulness), dumbness, feeblemindedness, gormlessness [chiefly British], idiocy, mindlessness, oafishness, obtuseness, simplemindedness, simpleness, slowness, stupidity, stupidness, vacuity; fallacy, irrationality, unreasonableness; kookiness, weirdness; laughableness, ludicrousness, ridiculousnessNear Antonyms of lunacy logicality, logicalness, rationality, rationalness, reasonability, reasonableness, validity; discernment, insight, perception, percipienceAntonyms of lunacy prudence, sagaciousness, sagacity, sageness, sanity, sapience, sensibleness, soundness, wisdom