CIDE DICTIONARY
converging, a.
Tending to one point; approaching each other; convergent; as, converging lines. Whewell. [1913 Webster]
Converging rays(Opt.), rays of light, which, proceeding from different points of an object, tend toward a single point. -- Converging series (Math.), a series in which if an indefinitely great number of terms be taken, their sum will become indefinitely near in value to a fixed quantity, which is called the sum of the series; -- opposed to a diverging series.
ROGET THESAURUS
converging
Convergence
N
convergence, confluence, concourse, conflux, congress, concurrence, concentration, convergency, appulse, meeting, corradiation, assemblage, resort, asymptote,
converging, convergent, confluent, concurrent, centripetal, asymptotical, asymptotic, confluxible.