Definitions

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

  • adjective Being the same.
  • adjective Exactly equal and alike.
  • adjective Biology Of or relating to a twin or twins developed from the same fertilized ovum and having the same genetic makeup and closely similar appearance; monozygotic.

from The Century Dictionary.

  • Being the same; absolutely indistinguishable; distinguishable only as points of view of that which is one in its own being: also used loosely to express the fact that two or more things compared are the same in the particulars considered, or differ in no essential point.
  • Expressing identity.

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

  • adjective The same; the selfsame; the very same; not different.
  • adjective Uttering sameness or the same truth; expressing in the predicate what is given, or obviously implied, in the subject; tautological.
  • adjective (Alg.) an equation which is true for all values of the algebraic symbols which enter into it.

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

  • adjective not comparable Bearing full likeness by having precisely the same set of characteristics; indistinguishable.
  • adjective not comparable Not different or other; not another or others; not different as regards self; selfsame; numerically identical.
  • adjective not comparable Having some particular qualities or characteristics in common, but not all of them.
  • adjective not comparable, biology Of twins, sharing the same genetic code.
  • adjective not comparable, mathematics Exactly equivalent.
  • adjective comparable, rare Approximating or approaching exact equivalence.
  • noun usually pluralized Something which has exactly the same properties as something else.

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

  • adjective exactly alike; incapable of being perceived as different
  • adjective (of twins) derived from a single egg or ovum
  • adjective having properties with uniform values along all axes
  • adjective being the exact same one; not any other:
  • adjective coinciding exactly when superimposed

Etymologies

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

[From Medieval Latin identicus, from Late Latin identitās, identity; see identity.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From identic +‎ -al.

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Examples

  • Thus Theseus 2 can be identical with Theseus 1 only in a “loose and popular” sense of ˜identical™.

    Roderick Chisholm Feldman, Richard 2008

  • In using the term identical it is intended to designate just one unit of the course, as English I, or Latin II.

    The High School Failures A Study of the School Records of Pupils Failing in Academic or Commercial High School Subjects Francis P. Obrien

  • However, the term identical twins actually refers to a type of twinning, and describes how they form, not what they look like.

    Salem News 2010

  • However, the term identical twins actually refers to a type of twinning, and describes how they form, not what they look like.

    Salem News 2010

  • When we get these binaries, now we can compare each one of them to the binary form of the inputs to determine the term identical to the state of prime implicant.

    The Code Project Latest Articles legendman_a1 2009

  • These men undoubtedly influenced the eventual abandonment of dressing boys and girls in identical dresses in the early 20th century; children are especially impressionable, and susceptible to gender confusion (which was, and remains, generally undesirable).

    Tove Hermanson: Age and Gender Appropriate Fashion Tove Hermanson 2010

  • These men undoubtedly influenced the eventual abandonment of dressing boys and girls in identical dresses in the early 20th century; children are especially impressionable, and susceptible to gender confusion (which was, and remains, generally undesirable).

    Tove Hermanson: Age and Gender Appropriate Fashion Tove Hermanson 2010

  • These men undoubtedly influenced the eventual abandonment of dressing boys and girls in identical dresses in the early 20th century; children are especially impressionable, and susceptible to gender confusion (which was, and remains, generally undesirable).

    Tove Hermanson: Age and Gender Appropriate Fashion Tove Hermanson 2010

  • After a minute or two, we arrived at a large security door, guarded by two armed men, dressed in identical dark green uniforms.

    Blonde, Black and Blood Red nathreee 2010

  • And you can see that all three approaches result in identical curves.

    Wolfram Blog : Splines Come to Mathematica 2009

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