adj. Coming tardily after or behind; slow; tardy.adj. Last; long-delayed; -- obsolete, except in the phrase lag end.adj. Last made; hence, made of refuse; inferior.n. One who lags; that which comes in last.n. The fag-end; the rump; hence, the lowest class.n. The amount of retardation of anything, as of a valve in a steam engine, in opening or closing.n. A stave of a cask, drum, etc.n. See Graylag.n. The failing behind or retardation of one phenomenon with respect to another to which it is closely related.verb-intransitive. To walk or more slowly; to stay or fall behind; to linger or loiter.v. To cause to lag; to slacken.v. To cover, as the cylinder of a steam engine, with lags. See Lag, n., 4.n. One transported for a crime.v. To transport for crime.