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

  • adjective Required or necessary as a prior condition.
  • noun Something that is prerequisite, as a course that is required prior to taking an advanced course.

from The Century Dictionary.

  • Previously required; necessary as a condition of something following.
  • noun A condition required beforehand; a preliminary necessity.

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

  • adjective Previously required; necessary as a preliminary to any proposed effect or end.
  • noun Something previously required, or necessary to an end or effect proposed.

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

  • adjective Required as a prior condition of something else; necessary or indispensable.
  • noun Something that must be gained in order to gain something else
  • noun In education, a course or topic that must be completed before another course or topic can be started. May be colloquially referred to as a prereq.

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

  • noun something that is required in advance
  • adjective required as a prior condition or course of study


from Wiktionary, Creative Commons Attribution/Share-Alike License

From pre- +‎ requisite.


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