Lag

1. The fag-end; the rump; hence, the lowest class.
2. One transported for a crime.
3. To cover, as the cylinder of a steam engine, with lags. See Lag, n., 4.
4. Last; long-delayed; -- obsolete, except in the phrase lag end.
5. Coming tardily after or behind; slow; tardy.
6. The amount of retardation of anything, as of a valve in a steam engine, in opening or closing.
7. 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.
8. To cause to lag; to slacken.
9. One who lags; that which comes in last.
10. To transport for crime.
11. Last made; hence, made of refuse; inferior.
12. To walk or more slowly; to stay or fall behind; to linger or loiter.