Definition of timber:

part of speech: noun

The crest on a coat of arms; an acoustic property by which sounds of the same note and loudness, on two different instruments, are distinguished from each other by a different quality.

part of speech: noun

Wood fit for building purposes; the trunk of a tree; the main beams of a building; one of the upright pieces of a ship's frame.

part of speech: verb transitive

To furnish with timber.

part of speech: adjective

Furnishing timber; made of or used for timber.