A Bullet

A projectile, usually of metal, shot from a gun at high speed.
(informal) An entire round of unfired ammunition for a firearm, including the projectile, the cartridge casing, the propellant charge, etc.
Ammunition for a sling or slingshot which has been manufactured for such use.
(typography) A printed symbol in the form of a solid circle, (•), often used in lieu of numbers for marking items in a list. (see also bulleted)
(banking, finance) A large scheduled repayment of the principal of a loan; a balloon payment.
A rejection letter, as for employment, admission to a school or a competition.
(The addition of quotations indicative of this usage is being sought:) (slang) One year of prison time
(slang) An ace (the playing card).
(figuratively) Anything that is projected extremely fast.
(in attributive use) Very fast (speedy).
(fishing) A plumb or sinker.
(Ireland, particularly in Northern Ireland) The heavy projectile thrown in a game of road bowling.
(Australia) A roughly bullet-shaped sweet consisting of a cylinder of liquorice covered in chocolate.
(obsolete) A small ball.
(obsolete) A cannonball.
(obsolete) The fetlock of a horse.
A notation used on pop music charts to indicate that a song is climbing in the rankings.