noun

• The degree to which two or more things diverge.
• (calculus) 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)
• (obsolete) disagreement; difference
• The process in which two or more populations accumulate genetic changes (mutations) through time.