the GNU version of the Collaborative International Dictionary of English
n. A horn in which gunpowder is carried.
The Century Dictionary and Cyclopedia
n. A powderflask made of horn, usually the horn of an ox or cow, the larger end fitted with a wooden or metal bottom, and the small end with a movable stopper or some special device for measuring out a charge of powder.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. container for carrying gunpowder; made of the hollow horn of an animal
Word Usage
"He's making me a powder measure out of a warthog tusk and customizing my powderhorn right now."