n. A representation of two bones crossed diagonally, especially as a symbol of danger or death
the GNU version of the Collaborative International Dictionary of English
noun-plural. A representation of two of the leg bones or arm bones of a skeleton, laid crosswise, often surmounted with a skull, and serving as a symbol of death.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. two crossed bones (or a representation of two crossed bones) used as a symbol danger or death
Word Usage
"Never reveal the secret of the Jolly Roger: the crossbones are the crossings—the lines that separate the contraries and opposites."