a turn. [only in phrase.]-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.-the measure of what is contained in a jar; as, a jar of oil; a jar of preserves.-to  give forth a rudely quivering or tremulous sound; to sound harshly or discordantly; as, the notes jarred on my ears.-to act in opposition or disagreement; to clash; to interfere; to quarrel; to dispute.-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.-to tick; to beat; to mark or tell off.-a rattling, tremulous vibration or shock; a shake; a harsh sound; a discord; as, the jar of a train; the jar of harsh sounds.-clash of interest or opinions; collision; discord; debate; slight disagreement.-a regular vibration, as of a pendulum.-in deep well boring, a device resembling two long chain links, for connecting a percussion drill to the rod or rope which works it, so that the drill is driven down by impact and is jerked loose when jammed.