variance

(noun) an event that departs from expectations. Synonyms: discrepancy, variant.

(noun) discord that splits a group. Synonyms: division.

(noun) the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value.

(noun) a difference between conflicting facts or claims or opinions. Synonyms: discrepancy, disagreement, divergence. Example: "A growing divergence of opinion."

(noun) the quality of being subject to variation. Synonyms: variability, variableness.

(noun) an official dispensation to act contrary to a rule or regulation (typically a building regulation). Example: "A zoning variance."

(noun) an activity that varies from a norm or standard. Synonyms: variation. Example: "Any variation in his routine was immediately reported."