The act of varying or the state of being variable.
A difference between what is expected and what is observed; deviation.
The state of differing or being in conflict.
An official permit to do something that is ordinarily forbidden by regulations.
(law) A discrepancy between two legal documents.
(law) A departure from a cause of action originally in a complaint.
(statistics) The second central moment in probability.
(physics, chemistry, biology) The number of degrees of freedom in a system.
(computing, programming) Covariance and contravariance generally.