Definition of "Jar" :

noun: a vessel (usually cylindrical) with a wide mouth and without handles

noun: a sudden jarring impact

"All the jars and jolts were smoothed out by the shock absorbers."

noun: the quantity contained in a jar

"He drank a jar of beer."

verb: place in a cylindrical vessel

"Jar the jam."

verb: affect in a disagreeable way

"This play jarred the audience."

verb: move or cause to move with a sudden jerky motion

verb: shock physically

verb: be incompatible; be or come into conflict