The Collaborative International Dictionary of English v.0.48:
Spot \Spot\, v. t. [imp. & p. p. Spotted; p. pr. & vb. n.
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.
2. To mark or note so as to insure recognition; to recognize;
to detect; as, to spot a criminal. [Cant]
3. To stain; to blemish; to taint; to disgrace; to tarnish,
as reputation; to asperse.
My virgin life no spotted thoughts shall stain.
If ever I shall close these eyes but once,
May I live spotted for my perjury. --Beau. & Fl.
To spot timber, to cut or chip it, in preparation for