Webster's Revised Unabridged Dictionary · 1913

Scot

Scot , noun

A name for a horse. [Obsolete] — Chaucer

Scot , noun

[Compare Latin Skoti, pl., Anglo-Saxon Scotta, pl. Skottas, Sceottas.]

A native or inhabitant of Scotland; a Scotsman, or Scotchman.

Scot , noun

[Icelandic skot; or Old French escot, French écot, Late Latin scottum, scotum, from a kindred German word; akin to Anglo-Saxon scot, and English shot, shoot; compare Anglo-Saxon sceótan to shoot, to contribute. See Shoot, and compare Shot.]

A portion of money assessed or paid; a tax or contribution; a mulct; a fine; a shot.
Experienced men of the world know very well that it is best to pay scot and lot as they go along. — Emerson