Webster's Revised Unabridged Dictionary · 1913

Coop

Coop (kop) , noun

[Compare Anglo-Saxon cypa a measure, Dutch kuip tub, Icelandic kupa bowl, German kufe coop tub; all from Latin cupa vat, tub, Late Latin cupa, copa, cup. See Cup, and compare Keeve.]

1.
A barrel or cask for liquor. [Obsolete] — Johnson
2.
An inclosure for keeping small animals; a pen; especially, a grated box for confining poultry.
3.
A cart made close with boards; a tumbrel. [Scotch]

Coop , transitive verb

To confine in a coop; hence, to shut up or confine in a narrow compass; to cramp; -- usually followed by up, sometimes by in.
The Trojans cooped within their walls so long. — Dryden
The contempt of all other knowledge... coops the understanding up within narrow bounds. — Locke
2.
To work upon in the manner of a cooper. [Obsolete]
Shaken tubs... be new cooped. — Holland