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

  • n. Something that is required; a necessity.
  • n. Something obligatory; a prerequisite.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A necessity or prerequisite; something required or obligatory.
  • n. Something asked.
  • n. A statement (in domain specific terms) which specifies a verifiable constraint on an implementation that it shall undeniably meet or (a) be deemed unacceptable, or (b) result in implementation failure, or (c) result in system failure.

from the GNU version of the Collaborative International Dictionary of English

  • n. The act of requiring; demand; requisition.
  • n. That which is required; an imperative or authoritative command; an essential condition; something needed or necessary; a need.

from The Century Dictionary and Cyclopedia

  • n. The act of requiring, in any sense; demand; requisition.
  • n. That which requires the doing of something; an authoritative or imperative command; an essential condition; claim.
  • n. That which is required; something demanded or necessary.
  • n. Synonyms Requisite, Requirement (see requisite), mandate, injunction, charge.

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

  • n. anything indispensable
  • n. required activity
  • n. something that is required in advance


require +‎ -ment (Wiktionary)



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