Cooper \Coop"er\ (?; 277), n. [From Coop.]

One who makes barrels, hogsheads, casks, etc.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Cooper \Coop"er\, v. t. [imp. & p. p. Coopered; p. pr. & vb. n. Coopering.]

To do the work of a cooper upon; as, to cooper a cask or barrel.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Cooper \Coop"er\, n. Work done by a cooper in making or repairing barrels, casks, etc.; the business of a cooper.

Source: Webster's Revised Unabridged Dictionary (1913)