Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

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

from The Century Dictionary.

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

from the GNU version of the Collaborative International Dictionary of English.

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

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A necessity or prerequisite; something required or obligatory.
  • noun Something asked.
  • noun engineering 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 WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun anything indispensable
  • noun required activity
  • noun something that is required in advance

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

require +‎ -ment

Examples

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