Lumber \Lum"ber\, n. [Prob. fr. Lombard, the Lombards being the money lenders and pawnbrokers of the Middle Ages. A lumber room was, according to Trench, originally a Lombard room, or room where the Lombard pawnbroker stored his pledges. See Lombard.]

1. A pawnbroker's shop, or room for storing articles put in pawn; hence, a pledge, or pawn. [Obs.]

They put all the little plate they had in the lumber, which is pawning it, till the ships came. --Lady Murray.

2. Old or refuse household stuff; things cumbrous, or bulky and useless, or of small value.

3. Timber sawed or split into the form of beams, joists, boards, planks, staves, hoops, etc.; esp., that which is smaller than heavy timber. [U.S.]

Lumber kiln, a room in which timber or lumber is dried by artificial heat. [U.S.]

Lumber room, a room in which unused furniture or other lumber is kept. [U.S.]

Lumber wagon, a heavy rough wagon, without springs, used for general farmwork, etc.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Lumber \Lum"ber\, b. t. [imp. & p. p. Lumbered; p. pr. & vb. n. Lumbering.]

1. To heap together in disorder. `` Stuff lumbered together.'' --Rymer.

2. To fill or encumber with lumber; as, to lumber up a room.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Lumber \Lum"ber\, v. i.

1. To move heavily, as if burdened.

2. [Cf. dial. Sw. lomra to resound.]

To make a sound as if moving heavily or clumsily; to rumble. --Cowper.

3. To cut logs in the forest, or prepare timber for market. [U.S.]

Source: Webster's Revised Unabridged Dictionary (1913)