old; no longer in use or valid or fashionable; "obsolete words"; "an obsolete locomotive"; "outdated equipment"; "superannuated laws"; "out-of-date ideas"
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
arrange (open windows) on a computer desktop so that they overlap each other, with the title bars visible
without speed (`slow' is sometimes used informally for `slowly'); "he spoke slowly"; "go easy here--the road is slippery"; "glaciers move tardily"; "please go slow so I can see the sights"