shotgun

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A smoothbore gun that fires shot over short ranges.
• noun Football An offensive formation, used especially for passing, in which the quarterback receives the snap several yards behind the line of scrimmage.
• adjective Of, relating to, or using a shotgun.
• adjective Obtained by or involving coercion.
• adjective Covering a wide range in a haphazard or ineffective manner.
• transitive verb To shoot at with a shotgun.
• interjection Used to claim the front passenger seat of a vehicle before a trip has started.
• idiom (ride shotgun) To sit in the front passenger seat of a vehicle during a trip.

from The Century Dictionary.

• noun A smooth-bore gun used for firing small shot, as in the chase of birds and small quadrupeds; a fowling-piece: commonly called gun simply, in implied distinction from rifle or other small-arm.

from the GNU version of the Collaborative International Dictionary of English.

• noun A light, smooth-bored gun, often double-barreled, especially designed for firing small shot at short range, and killing small game.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A gun which fires loads consisting of small metal balls, called shot, from a cartridge.
• noun slang The front passenger seat in a vehicle, next to the driver; so called because the position of the shotgun-armed guard on a horse-drawn stage-coach, wagon train, or gold transport was next to the driver on a forward-mounted bench seat.
• noun US A one-story dwelling with no hallways or corridors, with the rooms arranged in a straight line. Mostly heard in the southern United States.
• noun American football A play formation in which the quarterback is a few feet behind the snapper when the ball is hiked, ideally allowing for an easier pass play.
• verb slang, smoking To inhale from a pipe or other smoking device, followed shortly by an exhalation into someone else’s mouth.
• verb transitive, informal To verbally lay claim to (something)
• verb transitive, baseball To hit the ball directly back at the pitcher.
• verb US, slang To rapidly drink a beverage from a can by making a hole in the bottom of the can, placing the hole above one's mouth, and opening the top.
• adjective Of or relating to a shotgun.
• adjective Occurring as a result of the threat of force.
• adjective Utilizing numerous or highly diverse means to achieve a particular result.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun firearm that is a double-barreled smoothbore shoulder weapon for firing shot at short ranges