1. The act, condition, quality, or fact of converging.
2. Mathematics. The property or manner of approaching a limit, such as a point, line, function, or value.
3. The point of converging; a meeting place: a town at the convergence of two rivers.
4. Physiology. The coordinated turning of the eyes inward to focus on an object at close range.
5. Biology. The adaptive evolution of superficially similar structures, such as the wings of birds and insects, in unrelated species subjected to similar environments. Also called convergent evolution.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.