noun A small metal spike with a broadened flat head, driven typically into wood with a hammer to join things together or to serve as a peg or hook. A horny covering on the upper surface of the tip of the finger and toe in humans and other primates. A measure of length for cloth, equal to 21/4 inches. A measure of wool, beef, or other commodity, roughly equal to 7 or 8 pounds.
verb Fasten to a surface or to something else with a nail or nails. (nail the edge framing to the wall) Expose (someone) as deceitful or criminal; catch or arrest. (have you nailed the killer?) (of a fielder) put (a runner) out by throwing to a base. (he dropped a perfect throw home that should have nailed Joe by yards) (of a player) defeat or outwit (an opponent) (Navratilova tried to nail her on the backhand side) (of a player) secure (a victory) conclusively. (there's no doubt I had chances to nail it in the last set) Tackle (the quarterback or ballcarrier), especially at or behind the line of scrimmage. Perform (an action or task) perfectly. (she absolutely nailed the high notes) (of a man) have sexual intercourse with (someone).