Meaning of convergence

con•ver•gence

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. a coordinated turning of the eyes to bear upon a near point.
1. the contraction of a vector field.
2. a measure of this.
6. a net flow of air into a given region. Cf. divergence (def. 2).
7. similarity of form or structure caused by environment rather than heredity.