1.an act or instance of converging.
2.a convergent state or quality.
3.the degree or point at which lines, objects, etc., converge.
4.Ophthalmology. a coordinated turning of the eyes to bear upon a near point.
a.the contraction of a vector field.
b.a measure of this.
6.Meteorology. a net flow of air into a given region.Compare divergence (def. 2)
7.Biology. similarity of form or structure caused by environment rather than heredity.