kæsˈkeɪd kæsˈkeɪd ˈʃaʊ.ə(ɹ) arrange (open windows) on a computer desktop so that they overlap each other, with the title bars visible rush down in big quantities, like a cascade a sudden downpour (as of tears or sparks etc.) likened to a rain shower a little shower of rose petals a sudden cascade of sparks a succession of stages or operations or processes or units progressing in severity as though a cascade of genetic damage was occurring separation of isotopes by a cascade of processes a small waterfall or series of small waterfalls