To come together, as in one body or for a public purpose; to meet; to assemble.
To make a convention; to declare a rule by convention.
To cause to assemble; to call together; to convoke.
To come together; to meet; to unite.
To summon judicially to meet or appear.
(said of two or more entities) To approach each other; to get closer and closer.
(said of a sequence or series) To have a (finite, proper) limit.
(said of an iterative process) To reach a stable end point.