Definitions
1.nounSomething, such as a glove or other pledge, thrown down as a challenge to combat (now usually figurative).
2.nounSomething valuable deposited as a guarantee or pledge; security, ransom.
3.verbTo give or deposit as a pledge or security; to pawn.
4.verbTo wager, to bet.
5.verbTo bind by pledge, or security; to engage.