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ad hoc

[ad hok; Latin ahd hohk] /æd ˈhɒk; Latin ɑd ˈhoʊk/
for the special purpose or end presently under consideration:
a committee formed ad hoc to deal with the issue.
concerned or dealing with a specific subject, purpose, or end:
The ad hoc committee disbanded after making its final report.
Origin of ad hoc
First recorded in 1550-60, ad hoc is from the Latin word ad hōc for this
Can be confused

in hoc signo vinces

[in hohk sig-noh wing-keys; English in hok sig-noh vin-seez] /ɪn ˈhoʊk ˈsɪg noʊ ˈwɪŋ keɪs; English ɪn ˈhɒk ˈsɪg noʊ ˈvɪn siz/
in this sign shalt thou conquer: motto used by Constantine the Great, from his vision, before battle, of a cross bearing these words.

post hoc

[pohst hohk; English pohst hok] /ˈpoʊst ˈhoʊk; English ˈpoʊst ˈhɒk/
adverb, Latin.
after this; afterward.
Compare propter hoc.

post hoc, ergo propter hoc

[pohst hohk, er-goh prohp-ter hohk; English pohst hok, ur-goh prop-ter hok er-goh] /ˈpoʊst ˈhoʊk, ˈɛr goʊ ˈproʊp tɛr ˌhoʊk; English ˈpoʊst ˈhɒk, ˈɜr goʊ ˈprɒp tər ˌhɒk ˈɛr goʊ/
after this, therefore because of it: a formula designating an error in logic that accepts as a cause something that merely occurred earlier in time.

propter hoc

[prawp-ter hawk; English prop-ter hok] /ˈprɔp tɛr ˈhɔk; English ˈprɒp tər ˈhɒk/
adverb, Latin.
because of this.
Compare post hoc.

quoad hoc

[kwaw-ahd hohk; English kwoh-ad hok] /ˈkwɔ ɑd ˈhoʊk; English ˈkwoʊ æd ˈhɒk/
adverb, Latin.
as much as this; to this extent.

et hoc genus omne

[et hohk ge-noo s ohm-ne; English et hok jee-nuh s om-nee] /ɛt ˈhoʊk ˈgɛ nʊs ˈoʊm nɛ; English ɛt ˈhɒk ˈdʒi nəs ˈɒm ni/
and all this (or that) sort of thing.
Also, et id genus omne
[et id ge-noo s ohm-ne; English et id jee-nuh s om-nee] /ɛt ˈɪd ˈgɛ nʊs ˈoʊm nɛ; English ɛt ˈɪd ˈdʒi nəs ˈɒm ni/ (Show IPA)
. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for hoc
Historical Examples
  • Every day to wander out of doors till after nine, hoc non pergit.

    Debts of Honor Maurus Jkai
  • hoc erat in votis, I should indeed have been happy to have had you for a guest.

    Samuel Brohl & Company Victor Cherbuliez
  • So to church they went; and Staines, whose motto was "hoc age," minded his book.

    A Simpleton Charles Reade
  • But to introduce it into an old society, hic labor, hoc opus est!

    Colloquies on Society Robert Southey
  • For the principal characteristic of Essence is to be separable and hoc Aliquid.

    Aristotle George Grote
  • If there existed any such, it could never have become or been generated into hoc Aliquid.

    Aristotle George Grote
  • The priest started, and went on with the "Confirma, hoc, Deus."

    The Garden Of Allah Robert Hichens
  • Monsieur Wahlenfer, haven't you also your 'hoc erat in votis'?

    The Red Inn Honore de Balzac
  • He had tried with all his might to get interested in "Hic, hæc, hoc," but it was of no use.

  • As you can plume yourself on this, so "in hoc Cygno, vinces!"

British Dictionary definitions for hoc

ad hoc

/æd ˈhɒk/
adjective, adverb
for a particular purpose only; lacking generality or justification: an ad hoc decision, an ad hoc committee
Word Origin
Latin, literally: to this

post hoc

/ˈpəʊst ˈhɒk/
(logic) the fallacy of assuming that temporal succession is evidence of causal relation
Word Origin
from Latin, short for Post hoc ergo propter hoc after this, therefore on account of this
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for hoc

Latin, literally "this."

post hoc

Latin, "after this." Especially in post hoc, ergo propter hoc, logical fallacy, literally "after this, therefore because of this."

ad hoc

Latin, literally "for this (specific purpose)."

Online Etymology Dictionary, © 2010 Douglas Harper
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hoc in Culture
ad hoc [(ad hok, ad hohk)]

A phrase describing something created especially for a particular occasion: “We need an ad hoc committee to handle this new problem immediately.” From Latin, meaning “toward this (matter).”

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Idioms and Phrases with hoc

ad hoc

For the special purpose or end at hand; also, by extension, improvised or impromptu. The term, Latin for “to this,” is most often used for committees established for a specific purpose, as in The committee was formed ad hoc to address health insurance problems. The term is also used as an adjective (An ad hoc committee was formed), and has given rise to the noun adhocism for the tendency to use temporary, provisional, or improvised methods to deal with a particular problem. [ Early 1600s ]
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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