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