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lag·ging | \ ˈla-giŋ 
\
\Definition of lagging
: a lag or material used for making lags: such as
a : material for thermal insulation especially around a cylindrical object
b : planking used especially for preventing cave-ins in earthwork or for supporting an arch during construction
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More Definitions for lagging
lagging
nounEnglish Language Learners Definition of lagging
British : a special material that is used to cover something (such as a pipe) to keep it from losing or gaining heat
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Time Traveler for lagging
The first known use of lagging was in 1851
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