divergence

noun

1. (countable, uncountable)The state or degree of being divergent: of diverging.

   “An angle is made by the divergence of straight lines.”

2. (countable, uncountable)The operator which maps a function F=(F₁, ... Fₙ) from a n-dimensional vector space to itself to the function ∑ᵢ₌₁ⁿ(∂F_i)/(∂x_i).
3. (countable, obsolete, uncountable)Disagreement; difference.

   “divergence of thought”

4. (countable, uncountable)The process in which two or more populations accumulate genetic changes (mutations) through time.