Definition of variance

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var·i·ance

(vâr

ns, v

-) KEY

NOUN:

1. The act of varying.
2. The state or quality of being variant or variable; a variation.
3. A difference between what is expected and what actually occurs.
The state or fact of differing or of being in conflict. See Synonyms at discord.
Law
1. A discrepancy between two statements or documents in a proceeding.
2. License to engage in an act contrary to a usual rule: a zoning variance.
Statistics The square of the standard deviation.
Chemistry The number of thermodynamic variables, such as temperature and pressure, required to specify a state of equilibrium of a system, given by the phase rule.

IDIOM:
at variance

In a state of discrepancy; differing: The facts are at variance with your story.

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