|Origin:||Probably from a Scandinavian language|
lag1 past tense and past participle lagged, present participle lagging
1 [intransitive and transitive]
to move or develop more slowly than others
She stopped to wait for Ian who was lagging behind.
Britain is lagging behind the rest of Europe.
2 [transitive] British EnglishDH
to cover water pipes etc with a special material to prevent the water inside them from freezing or the heat from being lost:
We've had the hot-water tank lagged.