informal

• POS: Adjective
• HYPHEN: in=for=mal

CIDE DICTIONARY

informal, a. [Pref. in- not + formal.].

•  Not in the regular, usual, or established form; not according to official, conventional, prescribed, or customary forms or rules; irregular; hence, without ceremony; as, an informal writing, proceeding, or visit.  [1913 Webster]
•  Deranged in mind; out of one's senses.  [1913 Webster]

  "These poor informal women."  [1913 Webster]

OXFORD DICTIONARY

informal, adj.
1 without ceremony or formality (just an informal chat).
2 (of language, clothing, etc.) everyday; normal.

Idiom

informal vote NZ & Austral. an invalid vote or voting paper.

Derivative

informality n. (pl. -ies). informally adv.

THESAURUS

informal

Bohemian, affable, beat, beat-up, bedraggled, blowzy, breakaway, careless, casual, chintzy, colloquial, common, conversational, cordial, degage, dilapidated, drabbletailed, draggled, draggletailed, easy, easygoing, en deshabille, everyday, familiar, far out, folksy, free, free and easy, fringy, frowzy, frumpish, frumpy, garden-variety, gracious, grubby, haymish, heretical, heterodox, hippie, homely, homey, in dishabille, in rags, irregular, kinky, loose, lumpen, maverick, messy, mussy, natural, negligent, nonstandard, not cricket, not done, not kosher, offbeat, offhand, offhanded, ordinary, original, plain, poky, private, ragged, raggedy, relaxed, ruinous, scraggly, seedy, shabby, shoddy, simple, slack, slatternly, slipshod, sloppy, slovenly, sluttish, sociable, sordid, special, spoken, spontaneous, sporty, squalid, substandard, tacky, tattered, unaffected, unassuming, unauthorized, unceremonious, unconstrained, unconventional, uneducated, unfashionable, unkempt, unliterary, unneat, unofficial, unorthodox, unpretentious, unsightly, unstudied, untidy, vernacular, way out

ROGET THESAURUS

informal

Unconformity

N unconformity, nonconformity, unconformity, disconformity, unconventionality, informality, abnormity, abnormality, anomaly, anomalousness, exception, peculiarity, infraction of law, breach, of law, violation of law, violation of custom, violation of usage, infringement of law, infringement of custom, infringement of usage, teratism, eccentricity, bizarrerie, oddity, je ne sais quoi, monster, monstrosity, rarity, freak, freak of Nature, weirdo, mutant, rouser, snorter, individuality, idiosyncrasy, originality, mannerism, aberration, irregularity, variety, singularity, exemption, salvo, nonconformist, nondescript, character, original, nonesuch, nonsuch, monster, prodigy, wonder, miracle, curiosity, flying fish, black sheep, black swan, lusus naturae, rara avis, queer fish, mongrel, random breed, half-caste, half-blood, half-breed, metis, crossbreed, hybrid, mule, hinny, mulatto, tertium quid, hermaphrodite, phoenix, chimera, hydra, sphinx, minotaur, griffin, griffon, centaur, saggittary, kraken, cockatrice, wyvern, roc, dragon, sea serpent, mermaid, merman, merfolk, unicorn, Cyclops, men whose heads do grow beneath their shoulders, teratology, fish out of water, neither one thing nor another, neither fish nor fowl, neither fish flesh nor fowl nor good red herring, one in a million, one in a way, one in a thousand, outcast, outlaw, off the beaten track, oasis, uncomformable, exceptional, abnormal, abnormous, anomalous, anomalistic, out of order, out of place, out of keeping, out of tune, out of one's element, irregular, arbitrary, teratogenic, lawless, informal, aberrant, stray, wandering, wanton, peculiar, exclusive, unnatural, eccentric, egregious, out of the beaten track, off the beaten track, out of the common, out of the common run, beyond the pale of, out of the pale of, misplaced, funny, unusual, unaccustomed, uncustomary, unwonted, uncommon, rare, curious, odd, extraordinary, out of the ordinary, strange, monstrous, wonderful, unexpected, unaccountable, outre, out of the way, remarkable, noteworthy, queer, quaint, nondescript, none such, sui generis, unfashionable, fantastic, grotesque, bizarre, outlandish, exotic, tombe des nues, preternatural, denaturalized, heterogeneous, heteroclite, amorphous, mongrel, amphibious, epicene, half blood, hybrid, androgynous, androgynal, asymmetric, adelomorphous, bisexual, hermaphrodite, monoclinous, qualified, singular, unique, one-of-a-kind, newfangled, novel, non-classical, original, unconventional, unheard of, unfamiliar, undescribed, unprecedented, unparalleled, unexampled, unconformably, except, unless, save barring, beside, without, save and except, let alone, however, yet, but, once in a blue moon, once in a million years, Int, what on earth!, what in the world!, What the devil!, Holy cow!, Can you top that?, Sacre bleu, never was seen the like, never was heard the like, never was known the like, I could hardly believe it, I saw it, but I didn't believe it.

Illegality

N illegality, lawlessness, illicitness, breach of law, violation of law, infraction of the law, disobedience, unconformity, arbitrariness, antinomy, violence, brute force, despotism, outlawry, mob law, lynch law, club law, Lydford law, martial law, drumhead law, coup d'etat, le droit du plus fort, argumentum baculinum, illegality, informality, unlawfulness, illegitimacy, bar sinister, trover and conversion, smuggling, poaching, simony, outlaw, bad man, v, offend against the law, violate the law, infringe the law, break the law, set the law at defiance, ride roughshod over, drive a coach and six through a statute, ignore the law, make the law a dead letter, take the law into one's own hands, smuggle, run, poach, illegal, unlawful, illegitimate, not allowed, prohibited, illicit, contraband, actionable, unwarranted, unwarrantable, unauthorized, informal, unofficial, injudicial, extrajudicial, lawless, arbitrary, despotic, despotical, corrupt, summary, irresponsible, unanswerable, unaccountable, expired, invalid, unchartered, unconstitutional, null and void, a dead letter, lawless, unregulated, illegally, with a high hand, in violation of law.