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

  • adj. Required or necessary as a prior condition: Competence is prerequisite to promotion.
  • n. Something that is prerequisite, as a course that is required prior to taking an advanced course.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Required as a prior condition of something else; necessary or indispensable.
  • n. Something that must be gained in order to gain something else
  • n. 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 the GNU version of the Collaborative International Dictionary of English

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

from The Century Dictionary and Cyclopedia

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

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

  • n. something that is required in advance
  • adj. required as a prior condition or course of study


From pre- +‎ requisite. (Wiktionary)



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