Definition of "lumber"

Here they live by fishing on the most plentiful coasts in the world; there they fell trees, by the sides of large rivers, for masts and lumber […] .

1782, H. de Crèvecoeur, Letters from an American Farmer

The resources of Alaska, especially in fur, mines, and lumber, are considerable in extent and capable of large development, while its geographical situation is one of political and commercial importance.;

4 December 1883, Chester A. Arthur, Third State of the Union Address

I was visited by the duke of L—, a friend of my lord, who found me sitting upon a trunk, in a poor little dining-room filled with lumber, and lighted with two bits of tallow-candle, which had been left over night.

1751, [Tobias] Smollett, The Adventures of Peregrine Pickle […], volumes (please specify |volume=I to IV), London: Harrison and Co., […]

We made all haste down stairs, and soon threw open the street door, for the reception of as much lumber, of all sorts, as our house would hold, brought into it by several who thought it necessary to move their furniture.

1783, William Cowper, letter, 10 November

The bookful blockhead ignorantly read, / With loads of learned lumber in his head, […]

1709, [Alexander Pope], An Essay on Criticism, London: […] W. Lewis […], published 1711

They put all the little plate they had […] in the lumber, which is pawning it, till the ships came.

a. 1746, Lady Grisell Baillie Murray, Memoirs of the Lives and Characters of the Right Honourable George Baillie

...he was only apprized of the arrival of the Monkbarns division by the gee-hupping of the postilion, as the post-chaise lumbered up behind him.

1816, [Walter Scott], The Antiquary. […], volumes (please specify |volume=I to III), Edinburgh: […] James Ballantyne and Co. for Archibald Constable and Co.; London: Longman, Hurst, Rees, Orme, and Brown

The trooper climbed back on the rock and slid down to take the cadaver lowered to him by Bradly, who lumbered down to assist in carrying it.

1938, Norman Lindsay, Age of Consent, 1st Australian edition, Sydney, N.S.W.: Ure Smith, published 1962, page 221

Through eerie reach of ancient woods / Where lumbering mists arise / I journey for nines moons of the year / To where a land of legend lies

2002, Russell Allen, "Incantations of the Apprentice", on Symphony X, The Odyssey.

The mean utensils, pewter measures, empty cans and casks, with which this room was lumbered, proclaimed it that of the host, who slept, surrounded by his professional implements of hospitality and stock in trade.

1822, [Walter Scott], chapter XI, in Peveril of the Peak. […], volume II, Edinburgh: […] Archibald Constable and Co.; London: Hurst, Robinson, and Co., page 278

so much stuff lumberd together

1677, Thomas Rymer, The Tragedies of the Last Age Consider'd