Lag

1. (a.) Coming tardily after or behind; slow; tardy.
2. (a.) Last; long-delayed; -- obsolete, except in the phrase lag end.
3. (a.) Last made; hence, made of refuse; inferior.
4. (n.) One who lags; that which comes in last.
5. (n.) The fag-end; the rump; hence, the lowest class.
6. (n.) The amount of retardation of anything, as of a valve in a steam engine, in opening or closing.
7. (n.) 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. (n.) See Graylag.
9. (v. i.) To walk or more slowly; to stay or fall behind; to linger or loiter.
10. (v. t.) To cause to lag; to slacken.
11. (v. t.) To cover, as the cylinder of a steam engine, with lags. See Lag, n., 4.
12. (n.) One transported for a crime.
13. (v. t.) To transport for crime.
14. (n.) The failing behind or retardation of one phenomenon with respect to another to which it is closely related; as, the lag of magnetization compared with the magnetizing force (hysteresis); the lag of the current in an alternating circuit behind the impressed electro-motive force which produced it.