Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adv. For the specific purpose, case, or situation at hand and for no other: a committee formed ad hoc to address the issue of salaries.
  • adj. Formed for or concerned with one specific purpose: an ad hoc compensation committee.
  • adj. Improvised and often impromptu: "On an ad hoc basis, Congress has . . . placed . . . ceilings on military aid to specific countries” ( New York Times).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. For this particular purpose.
  • adj. Special.
  • adj. Created on the spur of the moment; impromptu.
  • adv. On the spur of the moment.
  • adv. For a particular purpose.

from The Century Dictionary and Cyclopedia

  • n. To this; with respect to this (subject or thing); in particular.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. for or concerned with one specific purpose
  • adj. often improvised or impromptu
  • adv. for one specific case

Etymologies

Latin : ad, to + hoc, neuter accusative of hic, this.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From New Latin ad hoc ("for this"). (Wiktionary)

Examples

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