What is the meaning of Lumber?

Wood sawn into planks or otherwise prepared for sale or use, especially as a building material.

Old furniture or other items that take up room, or are stored away.

Useless or cumbrous material.

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

A baseball bat.

An erect penis.

To move clumsily and heavily; to move slowly.

To load down with things, to fill, to encumber, to impose an unwanted burden on.

To heap together in disorder.

To fill or encumber with lumber.

To pawn (goods).

Source: wiktionary.org