(also convergency)
Definition of convergence
noun
[mass noun] the process or state of converging:the convergence of lines in the distance Biology the tendency of unrelated animals and plants to evolve superficially similar characteristics under similar environmental conditions: these bivalves have assumed similar characters by convergence (also convergence zone) a location where airflows or ocean currents meet, characteristically marked by upwelling (of air) or downwelling (of water).