singularity

[sing-gyuh-lar-i-tee]
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noun, plural sin·gu·lar·i·ties for 2–4.
  1. the state, fact, or quality of being singular.
  2. a singular, unusual, or unique quality; peculiarity.
  3. Mathematics. singular point.
  4. Astronomy. (in general relativity) the mathematical representation of a black hole.

Origin of singularity

1300–50; Middle English singularite < Late Latin singulāritās. See singular, -ity
Related formsnon·sin·gu·lar·i·ty, noun, plural non·sin·gu·lar·i·ties.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for singularity

singularity

noun plural -ties
  1. the state, fact, or quality of being singular
  2. something distinguishing a person or thing from others
  3. something remarkable or unusual
  4. maths
    1. a point at which a function is not differentiable although it is differentiable in a neighbourhood of that pointSee also pole 2 (def. 4)
    2. another word for discontinuity
  5. astronomy a hypothetical point in space-time at which matter is infinitely compressed to infinitesimal volume
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for singularity
n.

c.1400, "unusual behavior," also "singleness of aim or purpose," from Old French singulerte "peculiarity" (12c., Modern French singularité) or directly from Late Latin singularitatem (nominative singularitas) "a being alone," from singularis (see singular (adj.)). Meaning "fact of being different from others" is c.1500. Mathematical sense of "point at which a function takes an infinite value" is from 1893. Astronomical use is from 1965.

Online Etymology Dictionary, © 2010 Douglas Harper

singularity in Science

singularity

[sĭng′gyə-lărĭ-tē]
  1. A point of infinite density and infinitesimal volume, at which space and time become infinitely distorted according to the theory of General Relativity. According to the big bang theory, a gravitational singularity existed at the beginning of the universe. Singularities are also believed to exist at the center of black holes.
  2. 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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.