Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. A miscellaneous collection; a hodgepodge.
Century Dictionary and Cyclopedia
- n. A miscellaneous collection of things or persons; a confused mixture or medley.
Wiktionary
- n. A collection containing a variety of miscellaneous things
GNU Webster's 1913
- n. Colloq. & Humorous A miscellaneous collection of things or persons; a confused mixture; a medley; a hodgepodge.
WordNet 3.0
- n. a motley assortment of things
Etymologies
- Latin omnium, genitive pl. of omnis, all; see op- in Indo-European roots + gatherum (mock-Latinate alteration of gather). (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“I won't sink into pretension and argue that it is an art form, but I will say that it's far more than an omnium-gatherum of detritus, as its mocking gallery insists it is.”
Adam Hanft: Irving Penn, Twitter, and the Everydayness of Life
“We have, in this little township, two "general shopkeepers," dealers in groceries, mops, calicoes, candles, and the usual "_omnium-gatherum_" of household requirements.”
Blackwood's Edinburgh Magazine, Volume 61, No. 378, April, 1847
“In fact, there was every appearance that the tent had been for a long time used as a kind of store-room, the receptacle of a bandit's omnium-gatherum, and had been hastily prepared for unexpected inmates.”
“Look at the party itself -- a veritable omnium-gatherum of political odds and ends, huddled together under the party blanket like household gods and barn-yard refuse after a hurricane.”
“A livelier and more variegated omnium-gatherum was never assembled.”
“At one of those remarkable omnium-gatherum receptions at the Tuileries, of which I have spoken in a former chapter, she heard an American lady, to whom Louis Philippe was talking of his American recollections and of various persons he had known there, say to him, “Oh, sire, they all retain the most lively recollections of your majesty's sojourn among them, and wish nothing more than that you should return among them again!””
“And the dinginess of the article produced at last out of an omnium-gatherum sort of kitchen cupboard, made an ominous impression upon the country girl, accustomed”
“The book, a collection of short stories, is an omnium-gatherum of works by various writers.”
“But of course the party is just starting for Chad and Steve, whose omnium-gatherum of online videos has captivated the Web for the past year, at least since a”
“_omnium-gatherum_ country-store hinted that Perry was deceased.”
Lists
These user-created lists contain the word ‘omnium-gatherum’.
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To Define Collections
pasticcio, olio, compendium, assemblage, menagerie, miscellanea, farrago, hotchpot, omnium-gatherum, cento, gallimaufry, anthology and 2 more...
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Intertanglement
A list of bejumble and minglement.
intertanglement, mixture, commingle, commixtion, immixture, hodgepodge, hotchpotch, intermixture, medley, minglement, mingle-mangle, blendure and 60 more...
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Collections
Have I made this list before? Has someone else collected these words together? I can't remember, so I'm just going to start storing some things here.
collection, omnium-gatherum, sylloge, antiphonary, anthology, bestiary, cartulary, dossier, sampler, assortment, variety, hodgepodge and 65 more...
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addendumb's Words
fey, cockshut, redact, beatific, melange, arcanum, rarefied, dissemble, capitulation, detritus, ennui, anodyne and 381 more...
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sionnach's Words
contumely, fomite, holmgang, poltroon, eleemosynary, obsidian, nugatory, grindcore, felch, recrudescent, pyx, parenteral and 3271 more...
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likaluca's Words
recursive, genuflect, libidinous, emote, smote, importune, trill, chillax, overshare, shorn, needle, ego and 162 more...
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Collagency ✂
Comparing images, cut-up, and mixing meaning.
clusterfuck, fungible, juxtaposition, assemblage, cut, paste, arrangement, theme, symbolism, association, amalgam, represtational and 110 more...
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rememberers
prolix, ageusia, animadversion, anodyne, antic, arabesque, beadle, brachymetropia, colophon, desquamation, diaphoresis, diegesis and 3250 more...
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Useful Words
I can use these.
aptronym, haplology, ectopia, folderol, volute, caryatid, spandrel, pendulous, miasmic, gelid, dotty, anomie and 256 more...
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My Favourite Words Encountered While ...
dishabille, gormandise, opprobrium, interjaculate, halcyon, obloquy, apostasy, sententious, valetudinarian, Sybarite, hecatomb, coruscation and 19 more...
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Miscellanea
Pretty words. Words I really, really like.
causerie, persiflage, prickmedainty, chanteuse, menstruum, deliquesce, coruscant, umber, radiatrix, zoopsia, diamanté, desex and 50 more...
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perhapsolutely's Words
polyradiculoneuro..., abulia, abubble, abscission, abaft, zareba, abatis, abigail, abiogenesis, ablate, ablaut, abo and 1705 more...
Tweets
Looking for tweets for omnium-gatherum.

mollusque OED2 gives the plural as "omnium gatherums", rarely "omnium gathera" (it doesn't use the hyphen in its headword). It also gives adjectival and adverbial definitions, and another nounal one: "A kind of boisterous dance known in mid-17th cent. England, and perh. identical with the cushion-dance...or trenchmore.
See omnigatherum. Nov 12, 2007
sionnach I wonder what the plural form of this word is. Oct 8, 2007
addendumb a miscellaneous collection
probably a “jocular imitation of law Latin�? Sep 1, 2007