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.



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Question 1 of 7

Origin of ad hoc

First recorded in 1550–60, ad hoc is from the Latin word ad hōc for this


ad hoc a posteriori a priori ex post facto prima facie

Definition for hoc (2 of 7)

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.

Definition for hoc (3 of 7)

post hoc
[ pohst hohk; English pohst hok ]
/ ˈpoʊst ˈhoʊk; English ˈpoʊst ˈhɒk /

adverb Latin.

after this; afterward.
Compare propter hoc.

Definition for hoc (4 of 7)

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.

Definition for hoc (5 of 7)

propter hoc
[ prawp-ter hawk; English prop-ter hok ]
/ ˈprɔp tɛr ˈhɔk; English ˈprɒp tər ˈhɒk /

adverb Latin.

because of this.
Compare post hoc.

Definition for hoc (6 of 7)

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.

Definition for hoc (7 of 7)

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/. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for hoc

British Dictionary definitions for hoc (1 of 2)

ad hoc
/ (æd ˈhɒk) /

adjective, adverb

for a particular purpose only; lacking generality or justificationan ad hoc decision; an ad hoc committee

Word Origin for ad hoc

Latin, literally: to this

British Dictionary definitions for hoc (2 of 2)

post hoc
/ (ˈpəʊst ˈhɒk) /


logic the fallacy of assuming that temporal succession is evidence of causal relation

Word Origin for post hoc

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

Cultural definitions for hoc

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 Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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 Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.