The Collaborative International Dictionary of English v.0.48:
Coop \Coop\, v. t. [imp. & p. p. Cooped; p. pr. & vb. n.
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.
The contempt of all other knowledge . . . coops the
understanding up within narrow bounds. --Locke.
2. To work upon in the manner of a cooper. [Obs.] "Shaken
tubs . . . be new cooped." --Holland.
Syn: To crowd; confine; imprison.