upside down

• POS: Adjective, Adverb
• HYPHEN: up=side down

CIDE DICTIONARY

upside down, adv. 

 in such a manner that the part normally pointed upward is pointed downward; same as upsidown and upsodown.  [PJC]

OXFORD DICTIONARY

upside down, adv. & adj.
--adv.
1 with the upper part where the lower part should be; in an inverted position.
2 in or into total disorder (everything was turned upside down).
--adj. (also upside-down attrib.) that is positioned upside down; inverted.

Idiom

upside-down cake a sponge cake baked with fruit in a syrup at the bottom, and inverted for serving.

Etymology

ME, orig. up so down, perh. = 'up as if down'

THESAURUS

upside down

a rebours, against the grain, anarchic, arsy-varsy, ass over elbows, ass-backwards, back-to-front, backwards, balled up, bollixed up, bottom side up, bottom up, by contraries, capsized, chaotic, chiastic, confused, contra, contrarily, contrariously, contrariwise, conversely, everted, fouled up, galley-west, haywire, head over heels, heels over head, helter-skelter, higgledy-piggledy, hugger-mugger, hyperbatic, in a mess, in flat opposition, inside out, introverted, invaginated, inversed, inversely, inverted, jumbled, just the opposite, mixed up, mixed-up, mucked up, muddled, nay rather, on the contrary, oppositely, otherwise, outside in, over, palindromic, per contra, quite the contrary, rather, resupinate, retroverted, reversed, scattered, screwed up, skimble-skamble, snafu, to the contrary, topsy-turvy, tout au contraire, transposed, turned around, vice versa, wrong side out

ROGET THESAURUS

upside down

Disorder

N disorder, derangement, irregularity, anomaly, anarchy, anarchism, want of method, untidiness, disunion, discord, confusion, confusedness, mishmash, mix, disarray, jumble, huddle, litter, lumber, cahotage, farrago, mess, mash, muddle, muss, hash, hodgepodge, hotch-potch, hotch-pot, imbroglio, chaos, omnium gatherum, medley, mere mixture, fortuitous concourse of atoms, disjecta membra, rudis indigestaque moles, complexity, turmoil, ferment, to-do, trouble, pudder, pother, row, rumble, disturbance, hubbub, convulsion, tumult, uproar, revolution, riot, rumpus, stour, scramble, brawl, fracas, rhubarb, fight, free-for-all, row, ruction, rumpus, embroilment, melee, spill and pelt, rough and tumble, whirlwind, bear garden, Babel, Saturnalia, donnybrook, Donnybrook Fair, confusion worse confounded, most admired disorder, concordia discors, Bedlam, all hell broke loose, bull in a china shop, all the fat in the fire, diable a' quatre, Devil to pay, pretty kettle of fish, pretty piece of work, pretty piece of business, disorderly person, disorderly persons offence, misdemeanor, slattern, slut (libertine), disorderly, orderless, out of order, out of place, out of gear, irregular, desultory, anomalous, acephalous, deranged, aimless, disorganized, straggling, unmethodical, immethodical, unsymmetric, unsystematic, untidy, slovenly, dislocated, out of sorts, promiscuous, indiscriminate, chaotic, anarchical, unarranged &c (arrange), confused, deranged, topsy-turvy, shapeless, disjointed, out of joint, troublous, riotous, complex, irregularly, by fits, by fits and snatches, by fits and starts, pellmell, higgledy-piggledy, helter-skelter, harum-scarum, in a ferment, at sixes and sevens, at cross-purposes, upside down, the cart before the horse, hysteron proteron, chaos is come again, the wreck of matter and the crush of worlds.

Inversion

N inversion, eversion, subversion, reversion, retroversion, introversion, contraposition, contrariety, reversal, turn of the tide, overturn, somersault, somerset, summerset, culbute, revulsion, pirouette, transposition, transposal, anastrophy, metastasis, hyperbaton, anastrophe, hysteron proteron, hypallage, synchysis, tmesis, parenthesis, metathesis, palindrome, pronation and supination, inverted, wrong side out, wrong side up, inside out, upside down, bottom upwards, keel upwards, supine, on one's head, topsy-turvy, sens dessus dessous, inverse, reverse, opposite, top heavy, inversely, hirdy-girdy, heels over head, head over heels.