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inequality

[in-i-kwol-i-tee] /ˌɪn ɪˈkwɒl ɪ ti/
noun, plural inequalities.
1.
the condition of being unequal; lack of equality; disparity:
inequality of size.
2.
social disparity:
inequality between the rich and the poor.
3.
disparity or relative inadequacy in natural endowments:
a startling inequality of intellect, talents, and physical stamina.
4.
injustice; partiality.
5.
unevenness, as of surface.
6.
an instance of unevenness.
7.
variableness, as of climate.
8.
Astronomy.
  1. any component part of the departure from uniformity in astronomical phenomena, especially in orbital motion.
  2. the amount of such a departure.
9.
Mathematics. a statement that two quantities are unequal, indicated by the symbol ≠; alternatively, by the symbol <, signifying that the quantity preceding the symbol is less than that following, or by the symbol >, signifying that the quantity preceding the symbol is greater than that following.
Origin
late Middle English
1375-1425
1375-1425; late Middle English < Latin inaequālitās. See in-3, equality
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for in-equality

inequality

/ˌɪnɪˈkwɒlɪtɪ/
noun (pl) -ties
1.
the state or quality of being unequal; disparity
2.
an instance of disparity
3.
lack of smoothness or regularity
4.
social or economic disparity
5.
(maths)
  1. a statement indicating that the value of one quantity or expression is not equal to another, as in xy
  2. a relationship between real numbers involving inequality: x may be greater than y, denoted by x>y, or less than y, denoted by x<y
6.
(astronomy) a departure from uniform orbital motion
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
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Word Origin and History for in-equality

inequality

n.

early 15c., "difference of rank or dignity," from Old French inequalité (14c.) and directly from Medieval Latin inaequalitas, from Latin inaequalis "unequal," from in- "not, opposite of" (see in- (1)) + aequalis "equal" (see equal).

Online Etymology Dictionary, © 2010 Douglas Harper
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3
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