Definition of "divergence"

The degree to which two or more things diverge.  examples

(calculus) the operator which maps a function F=(F1, ... Fn) from a n-dimensional vector space to itself to the function ∑ i = 1 n ∂ F i ∂ x i  examples

(obsolete) disagreement; difference  quotations

The process in which two or more populations accumulate genetic changes (mutations) through time.  examples