(1)   The act of preventing
"There was no bar against leaving"
"Money was allocated to study the cause and prevention of influenza"
(2)   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"
(3)   An obstruction (usually metal) placed at the top of a goal
"It was an excellent kick but the ball hit the bar"
(4)   A counter where you can obtain food or drink
"He bought a hot dog and a coke at the bar"
(5)   (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"
(6)   A heating element in an electric fire
"An electric fire with three bars"
(7)   A horizontal rod that serves as a support for gymnasts as they perform exercises
(8)   A room or establishment where alcoholic drinks are served over a counter
"He drowned his sorrows in whiskey at the bar"
(9)   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
(10)   A block of solid substance (such as soap or wax)
"A bar of chocolate"
(11)   Musical notation for a repeating pattern of musical beats
"The orchestra omitted the last twelve bars of the song"
(12)   The body of individuals qualified to practice law in a particular jurisdiction
"He was admitted to the bar in New Jersey"
(13)   A submerged (or partly submerged) ridge in a river or along a shore
"The boat ran aground on a submerged bar in the river"
(14)   (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"


(15)   Prevent from entering; keep out
"He was barred from membership in the club"
(16)   Secure with, or as if with, bars
"He barred the door"
(17)   Render unsuitable for passage
"Block the way"
"Barricade the streets"
"Stop the busy road"
(18)   Expel, as if by official decree
"He was banished from his own country"