LAGGING definition: the act of falling or staying behind. See examples of lagging used in a sentence.

The meaning of LAGGING is present participle of lag:2.

lag behind He's lagging behind - I think we'd better wait for him to catch us up. Sales are lagging at the moment.

lagging (ˈlæɡɪŋ) n 1. insulating material wrapped around pipes, boilers, etc, or laid in a roof loft, to prevent loss of heat 2. the act or process of applying lagging

Sep 23, 2025 · lagging (usually uncountable, plural laggings) The covering of something with strips of felt, wood etc, either as insulation or for protection. The material so used. "Whether you'll get a nine …

Mechanical Engineering, Building to line or cover (an excavation) with lagging. Building to cover with insulation, as a steam boiler, to prevent radiation of heat.

Lagging is special material which is used to cover pipes, water tanks, or the inside of a roof so that heat does not escape from them or so they do not freeze.