Meaning of LAGGING in English

I. ˈlagiŋ noun

( -s )

Etymology: from lagging, gerund of lag (IV)

slang chiefly Britain : a term or sentence of imprisonment, transportation, or penal servitude

II. “, -aag-, -aig- noun

( -s )

Etymology: lag (VI) + -ing

: a lag or material used for making lags: as

a. : material applied for thermal insulation especially around a cylindrical object

during cold weather, the oil tank and the oil lines may be covered with asbestos padding, called lagging , to keep the oil warm during flight — B.A.Shields

b. : poles or planking erected to prevent cave-ins in earthwork (as in a mine or tunnel)

c. : wooden strips for transferring to the centering form the weight of an arch under construction

d. : a detachable protective surface (as on a pulley or a drum)

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.