(countable) A gap, a delay; an interval created by something not keeping up; a latency. / (uncountable) Delay; latency. / (Britain, slang, archaic) One sentenced to transportation for a crime.

To fail to keep up (the pace), to fall behind. / To cover (for example, pipes) with felt strips or similar material (referring to a time lag effect in thermal transfer).

Late. / (obsolete) Last; long-delayed. / Last made; hence, made of refuse; inferior.

(poker) Loose (inclined to play many starting hands, including weak ones) and aggressive (inclined to raise often).

plural of lagging

simple past tense and past participle of lag

The covering of something with strips of felt, wood etc, either as insulation or for protection. / The material so used. / (slang, countable) A prison sentence.

present participle of lag

falling behind, not keeping up the pace / Occurring after; indicating the later phase of

plural of lag