'To spot timber' definitions:

Definition of 'To spot timber'

From: GCIDE

Spot \Spot\, v. t. [imp. & p. p. Spotted; p. pr. & vb. n. Spotting.]
1. To make visible marks upon with some foreign matter; to discolor in or with spots; to stain; to cover with spots or figures; as, to spot a garment; to spot paper. [1913 Webster]
2. To mark or note so as to insure recognition; to recognize; to detect; as, to spot a criminal. [Cant] [1913 Webster]
3. To stain; to blemish; to taint; to disgrace; to tarnish, as reputation; to asperse. [1913 Webster]
My virgin life no spotted thoughts shall stain. --Sir P. Sidney. [1913 Webster]
If ever I shall close these eyes but once, May I live spotted for my perjury. --Beau. & Fl. [1913 Webster]
To spot timber, to cut or chip it, in preparation for hewing. [1913 Webster]