1. (noun)jar a vessel (usually cylindrical) with a wide mouth and without handles
2. (noun)jar, jarful the quantity contained in a jar "he drank a jar of beer"
3. (verb)jolt, jar, jounce, shock a sudden jarring impact "the door closed with a jolt"; "all the jars and jolts were smoothed out by the shock absorbers"
4. (verb)clash, jar, collide be incompatible; be or come into conflict "These colors clash"
2. (noun)jar a deep, broad-mouthed vessel of earthenware or glass, for holding fruit, preserves, etc., or for ornamental purposes; as, a jar of honey; a rose jar
3. (noun)jar the measure of what is contained in a jar; as, a jar of oil; a jar of preserves
4. (noun)jar a rattling, tremulous vibration or shock; a shake; a harsh sound; a discord; as, the jar of a train; the jar of harsh sounds
8. (verb)jar to giveforth a rudely quivering or tremulous sound; to sound harshly or discordantly; as, the notes jarred on my ears
9. (verb)jar to act in opposition or disagreement; to clash; to interfere; to quarrel; to dispute
10. (verb)jar to cause a short, tremulous motion of, to cause to tremble, as by a sudden shock or blow; to shake; to shock; as, to jar the earth; to jar one's faith
11. (verb)jar to tick; to beat; to mark or tell off