1. A interrupt in the surface of a thing made by scratching, or by rubbing with anything pointed
or rough; a slight wound, mark, furrow, or incision. "The coarse file
. . . Makes deep scratches
in the work." (Moxon) "These nails with scratches deform
my breast." (Prior) "God forbid a shallow scratch
The prince of Wales from such a field
as this." (Shak)
2. A line
across the prize ring; up to which boxers are brought when they join
fight; hence, test, trial, or proof of courage; as, to bring
to the scratch; to come up to the scratch.
3. Minute, but tender and troublesome, excoriations, covered with scabs, upon the heels of horses which have been used where it is very wet or muddy.
4. A kind of wig covering only a portion of the head.
5. A shot which scores by chance and not as intended by the player; a fluke. Scratch cradle. See Cratch cradle, under Cratch.
Scratch herb, a climbing knotweed (Polygonum sagittatum) with a square stem beset with beautiful recurved prickles along the angles. Scratch wig. Same as Scratch, 4, above.
Source: Websters Vocabulary