[f. LUMBER v.1 + -ING1.] The action of LUMBER v.

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1621.  Lady M. Wroth, Urania, 486. Wee heard a noise … continuing with increase of lumbring.

2

1782.  Cowper, Gilpin, 232. The lumbering of the wheels.

3

1816.  Scott, Old Mort., xviii. The lumbering of the old guns backwards and forwards shook the battlements.

4