noun.
The act, condition, quality, or fact of converging.
noun.
The property or manner of approaching a limit, such as a point, line, function, or value.
noun.
The point of converging; a meeting place.
noun.
The coordinated turning of the eyes inward to focus on an object at close range.
noun.
The adaptive evolution of superficially similar structures, such as the wings of birds and insects, in unrelated species subjected to similar environments.