1the process or state of diverging:the divergence between primates and other groups
[count noun] a difference in opinions, interests, etc.:a fundamental divergence of attitude
[count noun] a place where airflows or ocean currents diverge, typically marked by downwelling (of air) or upwelling (of water).
2 Mathematics the scalar product of the operator del and a given vector, which gives a measure of the quantity of flux emanating from any point of the vector field or the rate of loss of mass, heat, etc., from it.
divergence in other Oxford dictionaries
Definition of divergence in the US English dictionary