• Coming tardily after or behind; slow; tardy. • Last; long-delayed; -- obsolete, except in the phrase lag end. • Last made; hence, made of refuse; inferior. • One who lags; that which comes in last. • The fag-end; the rump; hence, the lowest class. • The amount of retardation of anything, as of a valve in a steam engine, in opening or closing. • A stave of a cask, drum, etc.; especially (Mach.), one of the narrow boards or staves forming the covering of a cylindrical object, as a boiler, or the cylinder of a carding machine or a steam engine. • See Graylag. • To walk or more slowly; to stay or fall behind; to linger or loiter. • To cause to lag; to slacken. • To cover, as the cylinder of a steam engine, with lags. See Lag, n., 4. • One transported for a crime. • To transport for crime.