Lag-line

noun
1.
See under 1 (def 6).
[lag] /læg/
verb (used without object), lagged, lagging.
1.
to fail to maintain a desired pace or to keep up; fall or stay behind:
After five minutes of hard running, some of them began to lag.
2.
to move or develop slowly, as toward a goal or objective, or in relation to an associated factor (often followed by behind):
to lag behind in production.
3.
to delay or fail in reaching full development:
The factory lags regularly in making its quota.
4.
to hang back; linger; delay:
The old friends lagged because they wanted to talk some more.
5.
to decrease, wane, or flag gradually, as in intensity:
Interest lagged as the meeting went on.
6.
Marbles. to throw one’s shooting marble toward a line (lag line) on the ground in order to decide on the order of play.
7.
Billiards, Pool. (def 17b).
verb (used with object), lagged, lagging.
8.
to fail to keep up with:
The industry still lags the national economy.
9.
Obsolete. to cause to lag.
noun
10.
a or falling behind; retardation.
11.
a person who lags behind, is the last to arrive, etc.
12.
an interval or lapse of time:
There was a developmental lag in the diffusion of ideas.
13.
Mechanics. the amount of retardation of some motion.
14.
Electricity. the retardation of one alternating quantity, as current, with respect to another related alternating quantity, as voltage, often expressed in degrees.
15.
Marbles, Billiards. the act of lagging.
/læɡ/
verb (intransitive) lags, lagging, lagged
1.
(often foll by behind) to hang (back) or fall (behind) in movement, progress, development, etc
2.
to fall away in strength or intensity
3.
to determine an order of play in certain games, as by rolling marbles towards a line or, in billiards, hitting cue balls up the table against the top cushion in an attempt to bring them back close to the headrail
noun
4.
the act or state of slowing down or falling behind
5.
the interval of time between two events, esp between an action and its effect
6.
an act of lagging in a game, such as billiards
/læɡ/
noun
1.
a convict or ex-convict (esp in the phrase old lag)
2.
a term of imprisonment
verb lags, lagging, lagged
3.
(transitive) to arrest or put in prison
/læɡ/
verb lags, lagging, lagged
1.
(transitive) to cover (a pipe, cylinder, etc) with lagging to prevent loss of heat
noun
2.
the insulating casing of a steam cylinder, boiler, etc; lagging
3.
a stave or lath
v.

“fail to keep pace,” 1520s, earlier as a noun meaning “last person” (1510s), later also as an adjective (1550s; e.g. lag-mon “last man”), all of uncertain relationship, possibly from a Scandinavian source (cf. Norwegian lagga “go slowly”), or some dialectal version of last, lack, or delay. Related: Lag; lagging. The noun meaning “retardation” is from 1855. First record of lag time is from 1951.

noun

A convict: lags who escape from the county pokey (1930s+ Underworld)

verb

To arrest or imprison a criminal (1940s+ Underworld)