(lag) v.i. lagged, lag·ging
1. To move slowly; stay or fall behind; loiter.
2. In billiards, to shoot one's cue ball to the end rail so that it will rebound to the head rail, the player whose ball stops nearest the end rail winning first place in the order of play.
3. In marbles, to throw one's taw as near as possible to a line on the ground in order to decide the order of play. See synonyms under LINGER.
—noun
1. Retardation of movement for any cause.
2. The retardation of magnetization in respect of a magnetizing force.
3. In billiards and marbles, an act of lagging. [? Var. of LACK]

(lag) noun
1. A stave of a barrel, cask, drum, etc.
2. A piece forming part of a lagging.
—v.t. lagged, lag·ging To provide or cover with lags or lagging. [Prob. <ON lögg rim of a barrel]

(lag) v.t. lagged, lag·ging Slang
1. To arrest.
2. To send to penal servitude.
—noun Slang
1. A convict.
2. A period of penal servitude. [Prob. <LEG, with ref. to fetters]