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

  • transitive v. To make equal or equivalent.
  • transitive v. To reduce to a standard or an average; equalize.
  • transitive v. To consider, treat, or depict as equal or equivalent: equates inexperience with youth.
  • intransitive v. To be or seem to be equal; correspond.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To consider equal, to state as being equivalent.

from the GNU version of the Collaborative International Dictionary of English

  • transitive v. To make equal; to reduce to an average; to make such an allowance or correction in as will reduce to a common standard of comparison; to reduce to mean time or motion

from The Century Dictionary and Cyclopedia

  • To make equal or equivalent; regard or treat as equal.
  • To reduce to an average; make such correction or allowance in as will reduce to a common standard of comparison, or will bring to a true result: as, to equate observations in astronomy.
  • To be equal or equivalent to; equal.
  • In entomology, smooth, as a surface; having no special elevations or depressions. Also equal.
  • To join by the sign of equality.
  • In the preparation of the running schedules for trains, to make an allowance of an imaginary increase in length of line, on account of and as an equivalent of the retardation due to curves.

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

  • v. make equal, uniform, corresponding, or matching
  • v. be equivalent or parallel, in mathematics
  • v. consider or describe as similar, equal, or analogous


Middle English equaten, from Latin aequāre, aequāt-, from aequus, even, equal.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin aequātus, past participle of aequō. (Wiktionary)



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