1. slowness; lateness; delay, lingering; (Computers) lapse resulting from slow response time between two computers; measurement of delay (Mechanics); rim of a drum. (British Slang) criminal, prisoner, ex-convict; prison time. fall behind, fail to keep up with the established pace, straggle; develop slowly; linger, tarry; slacken, flag, weaken; imprison (British Slang); insulate (from heat). laglag , n