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See also: unît



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Formerly unite, a later form of unity; see unity.


  • IPA(key): /ˈjuː.nɪt/
  • (file)
  • (file)
  • Rhymes: -uːnɪt


unit (plural units)

  1. (mathematics) Oneness, singularity, seen as a component of a whole number; a magnitude of one. [from 16th c.]
    • 1570, John Dee, in H. Billingsley (trans.) Euclid, Elements of Geometry, Preface:
      Number, we define, to be, a certayne Mathematicall Sũme, of Vnits. [Note the worde, Vnit, to expresse the Greke Monas, & not Vnitie: as we haue all, commonly, till now, vsed.]
  2. (sciences) A standard measure of a quantity.
    The centimetre is a unit of length.
  3. The number one.
  4. Clipping of international unit.
    This pill provides 500 units of Vitamin E.
  5. An organized group comprising people and/or equipment.
    He was a member of a special police unit.
  6. (military, informal) A member of a military organization.
    The fifth tank brigade moved in with 20 units. (i.e., 20 tanks)
  7. (US, military) Any military element whose structure is prescribed by competent authority, such as a table of organization and equipment; specifically, part of an organization[1].
  8. (US, military) An organization title of a subdivision of a group in a task force[1].
  9. (US, military) A standard or basic quantity into which an item of supply is divided, issued, or detailed. In this meaning, also called unit of issue[1].
  10. (US, military) With regard to Reserve Components of the Armed Forces, denotes a Selected Reserve unit organized, equipped, and trained for mobilization to serve on active duty as a unit or to augment or be augmented by another unit. Headquarters and support functions without wartime missions are not considered units[1].
  11. (algebra) The identity element, neutral element.
  12. (algebra) An element having an inverse, an invertible element; an associate of the unity.
  13. (category theory) In an adjunction, a natural transformation from the identity functor of the domain of the left adjoint functor to the composition of the right adjoint functor with the left adjoint functor.
  14. (geology) A volume of rock or ice of identifiable origin and age range that is defined by the distinctive and dominant, easily mapped and recognizable petrographic, lithologic or paleontologic features (facies) that characterize it.
  15. (commerce) An item which may be sold singly.
    We shipped nearly twice as many units this month as last month.
  16. (Britain) A unit of alcohol.
  17. (Britain, electricity) One kilowatt-hour (as recorded on an electricity meter).
  18. (Australia, New Zealand) a measure of housing equivalent to the living quarters of one household, an apartment where a group of apartments is contained in one or more multi-storied buildings or a group of dwellings is in one or more single storey buildings, usually arranged around a driveway.
  19. (historical) A gold coin of the reign of James I, worth twenty shillings.
    (Can we find and add a quotation of Camden to this entry?)
  20. A work unit.
  21. (Britain, slang) A physically large person.
    • 2018, 11 December, BBC News, Aylesbury goalkeeper, 14, dies after match injury
      Luca's father, Americo Campanaro, said: "I feel like my heart has been ripped out."
      Mr Campanaro added: "He was a big lad, a big unit, that's why he was a goalkeeper, with a big heart to match. A gentle giant."



The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.


unit (not comparable)

  1. For each unit.
    We have to keep our unit costs down if we want to make a profit.
  2. (mathematics) Having a size or magnitude of one.
    • 1990, William W. S. Wei, Time Series Analysis, →ISBN, page 9:
      Consider the following time sequence
      where   is a random variable with a zero mean and a unit variance and   is a random variable with a uniform distribution on the interval   independent of  .


Derived termsEdit


  1. 1.0 1.1 1.2 1.3 Joint Publication 1-02 U.S. Department of Defense Dictionary of Military and Associated Terms; 12 April 2001 (As Amended Through 14 April 2006).

Further readingEdit





unit (feminine unida, masculine plural units, feminine plural unides)

  1. united


unit m (feminine unida, masculine plural units, feminine plural unides)

  1. past participle of unir





  1. past and passive participle of unir






  1. past participle of uni



Alternative formsEdit




  1. (literary) second-person singular imperfect/conditional of uno


Welsh mutation
radical soft nasal h-prothesis
unit unchanged unchanged hunit
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.