from The Century Dictionary.

  • noun In mathematics, freedom from ambiguity in its outcome.
  • noun The state or character of being unique.

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

  • noun The state or quality of being unique or one-of-a-kind.

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

  • noun the quality of being one of a kind


Sorry, no etymologies found.


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  • Sort of like singularity.

    November 3, 2007

  • Yes, but singularity has some fairly sinister connotations that uniqueness doesn't:

    # Astrophysics: A point in space-time at which gravitational forces cause matter to have infinite density and infinitesimal volume, and space and time to become infinitely distorted.

    # Mathematics: A point at which the derivative does not exist for a given function but every neighborhood of which contains points for which the derivative exists.

    Another way of characterizing these behaviors might be to say that a singularity is the point where all hell breaks loose.

    November 3, 2007