[n] a United States coin worth one twentieth of a dollar
[n] a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite
[adj] priced at 5 cents; "I can still remember when a nickel ice-cream cone cost only 10 cents"
[adj] costing 5 dollars; slang for the price of unlawful drugs; "a nickel bag"
[v] plate with nickel; "nickel the plate"