Definitions
1.nounA silvery elemental metal with an atomic number of 28 and symbol Ni.
2.nounA coin worth 5 cents.
3.noun(by extension) Five dollars.
4.noun(by extension) Five hundred dollars.
5.noun(sometimes the nickel or the hot nickel) Interstate 5, a highway that runs along the west coast of the United States.
6.nounA playing card with the rank of five
7.nounA five-year prison sentence.
8.nounA defensive formation with five defensive backs, one of whom is a nickelback, instead of the more common four.
9.verbTo plate with nickel.