Definition of "Bar" :
noun: the act of preventing
"There was no bar against leaving."
noun: a rigid piece of metal or wood; usually used as a fastening or obstruction or weapon
"There were bars in the windows to prevent escape."
noun: an obstruction (usually metal) placed at the top of a goal
"It was an excellent kick but the ball hit the bar."
noun: a counter where you can obtain food or drink
"He bought a hot dog and a coke at the bar."
noun: (law) a railing that encloses the part of the courtroom where the judges and lawyers sit and the case is tried
"Spectators were not allowed past the bar."
noun: a heating element in an electric fire
"An electric fire with three bars."
noun: a horizontal rod that serves as a support for gymnasts as they perform exercises
noun: a room or establishment where alcoholic drinks are served over a counter
"He drowned his sorrows in whiskey at the bar."
noun: a portable .30 caliber automatic rifle operated by gas pressure and fed by cartridges from a magazine; used by United States troops in World War I and in World War II and in the Korean War
noun: a block of solid substance (such as soap or wax)
"A bar of chocolate."
noun: a narrow marking of a different color or texture from the background
"A green toad with small black stripes or bars."
noun: musical notation for a repeating pattern of musical beats
"The orchestra omitted the last twelve bars of the song."
noun: the body of individuals qualified to practice law in a particular jurisdiction
"He was admitted to the bar in New Jersey."
noun: a submerged (or partly submerged) ridge in a river or along a shore
"The boat ran aground on a submerged bar in the river."
noun: (meteorology) a unit of pressure equal to a million dynes per square centimeter
"Unfortunately some writers have used bar for one dyne per square centimeter."
verb: prevent from entering; keep out
"He was barred from membership in the club."
verb: secure with, or as if with, bars
"He barred the door."
verb: render unsuitable for passage
"Barricade the streets."
verb: expel, as if by official decree