I. ˈpau̇n-dər noun
Date: before 12th century
1. : one that pounds
2. : a tool used for pounding
II. noun
Date: 1684
1. : a gun throwing a projectile of a specified weight — used in combination
the ship was armed with six- pounders
2. : one having a usually specified weight or value in pounds — used in combination
caught a ten- pounder