Definition of lagging in English:
Material providing heat insulation for a boiler, pipes, etc.
- They are about water-lagging - putting lagging around water pipes to retain heating - and about energy conservation.
- It was used as insulation on the pipe lagging which ran throughout the factory and there was also asbestos in the roof.
- He claims that, while working as a labourer removing lagging from pipes in the Basement of Leinster House between 1986 and 1990, he was exposed to large quantities of asbestos.
mid 19th century: from lag2.