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

  • n. The state or quality of being one; singleness.
  • n. The state or quality of being in accord; harmony.
  • n. The combination or arrangement of parts into a whole; unification.
  • n. A combination or union thus formed.
  • n. Singleness or constancy of purpose or action; continuity: "In an army you need unity of purpose” ( Emmeline Pankhurst).
  • n. An ordering of all elements in a work of art or literature so that each contributes to a unified aesthetic effect.
  • n. The effect thus produced.
  • n. One of the three principles of dramatic structure derived by French neoclassicists from Aristotle's Poetics, stating that a drama should have but one plot, which should take place in a single day and be confined to a single locale.
  • n. Mathematics The number 1.
  • n. Mathematics See identity element.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Oneness; the state or fact of being one undivided entity.
  • n. A single undivided thing, seen as complete in itself.
  • n. Any of the three classical rules of drama (unity of action, unity of place, and unity of time).`
  • n. Any element of a set or field that behaves under a given operation as the number 1 behaves under multiplication.

from the GNU version of the Collaborative International Dictionary of English

  • n. The state of being one; oneness.
  • n. Concord; harmony; conjunction; agreement; uniformity
  • n. Any definite quantity, or aggregate of quantities or magnitudes taken as one, or for which 1 is made to stand in calculation; thus, in a table of natural sines, the radius of the circle is regarded as unity.
  • n. In dramatic composition, one of the principles by which a uniform tenor of story and propriety of representation are preserved; conformity in a composition to these; in oratory, discourse, etc., the due subordination and reference of every part to the development of the leading idea or the eastablishment of the main proposition.
  • n. Such a combination of parts as to constitute a whole, or a kind of symmetry of style and character.
  • n. The peculiar characteristics of an estate held by several in joint tenancy.

from The Century Dictionary and Cyclopedia

  • n. The state or property of being one; oneness, as opposed to multiplicity; individuality, as opposed to plurality.
  • n. Organic totality; that interconnection of parts which constitutes a complex whole; a systematic whole as distinguished from its constituent parts: as, the unity of consciousness; the unity of an artistic creation. See def. 9.
  • n. Identity; self-sameness; uniformity.
  • n. The state of being united or combined in one; especially, union as connected parts of a complex whole: as, the national unity of the separate states.
  • n. Harmony or accord in sentiments, affection, action, etc.; concord.
  • n. Sameness of character or effect; agreement; coincidence.
  • n. In mathematics, a quantity which, multiplied by any quantity of the system considered, gives that same quantity as the product.
  • n. The principle by which a uniform tenor of story and propriety of representation is preserved in literary compositions; conformity in a composition to this principle; a reference to some one purpose or leading idea, or to the main proposition, in all the parts of a discourse or composition. The so-called Aristotelian law of unity of time, of place, and of action (called ‘the unities’) in a drama was the fundamental rule or general idea from which the French classical dramatic writers and critics derived, or to which they referred, all their practical rules for the construction of a drama. This law demanded that there should be no shifting of the scene from place to place, that the whole series of events should be such as might occur within the space of a single day, and that nothing should be admitted irrelevant to the development of the single plot.
  • n. In artistic creations, a combination of parts such as to constitute a whole or to exhibit a form of symmetry in style and character; the quality of any work by which all the parts are subordinate to or promotive of one general design or effect.
  • n. In law: The holding of the same estate in undivided shares by two or more; joint tenancy.
  • n. The joint possession by one person of two rights by several titles.
  • n. A gold coin of the reign of James I. See unite.
  • n. See primitive.

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

  • n. the smallest whole number or a numeral representing this number
  • n. the quality of being united into one
  • n. an undivided or unbroken completeness or totality with nothing wanting


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

Middle English unite, from Old French, from Latin ūnitās, from ūnus, one.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Anglo-Norman unité, Old French unité, from Latin ūnitās, from ūnus ("one") + noun of state suffix -itās.



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  • in essentials unity; in nonessentials liberty; in all things, charity - Angelo Giuseppe Roncalli

    April 5, 2011