fail to keep up with another or others in movement or development

they waited for Tim who was lagging behind

a period of time between one event and another

a time lag between infection and symptoms

a retardation in an electric current or movement

enclose or cover (a boiler, pipes, etc.) with material that provides heat insulation

all pipes and tanks in the attic should be lagged

a lagged hot-water tank

a person who has been frequently convicted and sent to prison

both old lags were sentenced to ten years' imprisonment

arrest or send to prison

they were nearly lagged by the constables