/kooh"peuhr, koop"euhr/ , n.
1. a person who makes or repairs casks, barrels, etc.
v.t.
2. to make or repair (casks, barrels, etc.).
3. to furnish or fix (usually fol. by up ).
v.i.
4. to work as a cooper.
[ 1350-1400; ME couper kuper or MD cuper cuparius (L cup ( a ) cask, vat + -arius -ARY) ]