"lagging" in the noun sense
1. lagging
insulation used to wrap around pipes or boilers or laid in attics to prevent loss of heat
"lagging" in the verb sense
1. lag, dawdle, fall back, fall behind
hang (back) or fall (behind) in movement, progress, development, etc.
2. imprison, incarcerate, lag, immure, put behind bars, jail, jug, gaol, put away, remand
lock up or confine, in or as in a jail
"The suspects were imprisoned without trial"
"the murderer was incarcerated for the rest of his life"
3. lag
throw or pitch at a mark, as with coins
4. lag
cover with lagging to prevent heat loss
"lag pipes"
Source: WordNet® (An amazing lexical database of English)
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