Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Happening by accident or chance. See Synonyms at accidental.
- adj. Usage Problem Happening by a fortunate accident or chance.
- adj. Usage Problem Lucky or fortunate.
Century Dictionary and Cyclopedia
- Accidental; casual; happening by chance; coming or occurring without any cause, or without any general cause; random.
Wiktionary
- adj. Happening by chance; coincidental or accidental.
- adj. Happening by a lucky chance; lucky or fortunate.
- adj. Happening independently of human will.
GNU Webster's 1913
- adj. Happening by chance; coming or occuring unexpectedly, or without any known cause; chance.
- adj. Happening independently of human will or means of foresight; resulting from unavoidable physical causes.
WordNet 3.0
- adj. occurring by happy chance
- adj. having no cause or apparent cause
Etymologies
- Latin fortuītus; see bher-1 in Indo-European roots.
Examples
“Hence there grew up the belief that events which we describe as fortuitous or random or subject to chance are no different from any other happenings, except that we do not know why they happen.”
“For very many in the world attribute everything to themselves and their prudence, and what they cannot so attribute they call fortuitous and accidental, not knowing that human prudence is nothing and that "fortuitous" and "accidental" are idle words.”
“The reliance on coincidence or the fortuitous is often questionable, but the results at the same time are never quite incredible.”
“Krutak has been unemployed since quitting a job in July at a nonprofit, timing she called fortuitous in light of the Occupy movement.”
“A careful induction from all the passages where this number cannot be regarded as fortuitous, but is evidently of Divine ordinance and appointment (I call fortuitous such sevens as occur, Acts xix. 14; xx. 6), will leave no doubt that it claims throughont Scripture to be considered as the covenant number, the sign and signature of God's covenant relation to mankind, and above all to that portion of mankind with which this relation is not potential merely, but actual, namely the Church.”
“And he concludes, after referring to the fortuitous duty-free shopping interlude I shared with Bashar en route back to London from Damascus, by remarking: By this time, Michael, whos a very engaging personality, is a friend of the family!”
“Yet all of the various elements which have historically been assigned to Fortune, Fate, and Chance are gathered into a single providential system of which the fortuitous is a part.”
“Since Fortuna is a personification of the fortuitous, and the fortuitous is a branch of the chain of causality, its normal place in the providential scheme is within the realm of Fate, which is the unfolding of Providence in multiplicity and time.”
“An event that is described as fortuitous or accidental in the context of one set of interests may take on a different aspect when it is surveyed from another standpoint, being seen there as intrinsically related to the historian's principal theme or subject: in neither case, though, need the suggestion that it has no causal explanation be present.”
“More probably the resemblance which may be traced in this respect between the religions of the East and West is no more than what we commonly, though incorrectly, call a fortuitous coincidence, the effect of similar causes acting alike on the similar constitution of the human mind in different countries and under different skies.”
Lists
These user-created lists contain the word ‘fortuitous’.
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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 4084 more...
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The Latin Doctor is Greek to me
Biology Students, Gladiators, Devil Dogs & Harry Potter
et tu, semper fidelis, carpe diem, cui bono, pons asinorum, limbus, e pluribus unum, sine qua non, quidnunc, lacus oblivionis, quincunx, experimentum crucis and 128 more...
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Words build meanings from origins( etymology )
These come from gamma meditation ,I think.
discursive, exogenous, machinations, purportedly, sumptuous, congruity, cantankerous, incongruous, festoon, hessian, ratiocinative, stratigraphic and 837 more...
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common UA vocab. in US
Interesting, there is a traditional vocabulary of an Ukrainian, that differs from vocabulary of average American. It would be nice to explore it.
jackdaw, incongruous, cassock, vivid, magpie, humdrum, amongst, wonder, wandering, wheedling, wheedle, osseous and 368 more...
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GRE Study guide
Going through the Magoosh website, words I pulled from the verbal section. 2012.
magnanimous, correlate, anglicized, simulacrum, tantamount, obsequiousness, subterfuge, vehement, vociferous, benign, concomitant, veracity and 83 more...
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Happy Warm Joyful Words
fortuitous, auspicious, propitious, divine, sacred, cherish, grace, picnic, sunshine, felicity, harmony, serenity
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For Summer
analogous, prestidigitation, defenestrate, crux, supercilious, sunglasses, replete, foment, anthropomorphic, iota, intrinsic, prosaic and 29 more...
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edbert's list
Random first list words
cathartic, wordy, fortuitous, loquacious, indignation, troubador, inundate, undulate, douchebag, douchebaggery, livid, leery and 4 more...
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eatknee's list
Words that I enjoy and enjoy saying frequently.
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Phantonyms
"A word that means the opposite of another is an antonym; a word that looks as if it means one thing but means quite another could be called a phantonym, and warrants wariness."
--Jack...noisome, fulsome, disinterested, fortuitous, enervate, penultimate, presently, restive, simplistic, enormity
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Chris' Word List
My favorite uncommon words - these are words that you don't hear everyday, but perhaps you should.
perspicacity, repugnant, abhorrent, courtesan, consternation, fortuitous, cognizant, cultivate, inclination

sonofgroucho Wasn't it fortuitous that John came up with the idea of Wordie? Oct 27, 2007
abiohphobia Pronunciation:
\fȯr-ˈtü-ə-təs, -ˈtyü-, fər-\
Etymology:
Latin fortuitus; akin to Latin fort-, fors chance
Date:
1653
1: occurring by chance
a: fortunate, lucky
b: coming or happening by a lucky chance Oct 27, 2007