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Webster 1913 Edition

Noun.

(Mach.)

The clothing (esp., an outer, wooden covering), as of a steam cylinder, applied to prevent the radiation of heat; a covering of lags; – called also

deading

and

cleading

Lags, collectively; narrow planks extending from one rib to another in the centering of arches.

ppr.

Loitering; moving slowly and falling behind.

The nurse went lagging after with the child.