Definition of nickel
- nickel Noun A silvery elemental metal with an atomic number of 28 and symbol Ni.
- nickel Noun A coin worth 5 cents.
- nickel Noun Interstate 5, a highway that runs along the west coast of the United States.
- nickel Noun A playing card with the rank of five
- nickel Noun five dollars or five hundred dollars
- nickel Verb To plate with nickel.