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Created when necessary for a specific purpose (as opposed to being planned or prepared in advance). The phrase is Latin for "to this." Let's form an ad hoc committee to make some recommendations to the board, and then we'll decide how to address this issue. Ad hoc wireless networks often present security risks to unsuspecting mobile device users.
et hoc genus omne
From Latin, meaning "and all this/that sort of thing," used to allude to or include other similar things without naming them directly. The government has promised to crack down on the top companies in the world—Bike Roh Soft, Floogle, Slamazon, et hoc genus omne—for their failure to pay their appropriate share of taxes. The plot is a tired treatise on the burdens facing the affluent elite—lack of purpose, estranged relationships, et hoc genus omne.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ˌad ˈhoc(from Latin) arranged or happening when necessary and not planned in advance: The meetings will be held on an ad hoc basis.
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