jar

1. intransitive verb

2. 1a :  to have a harshly disagreeable or disconcerting effect The noise jarred on her nerves. a jarring experienceb :  to make a harsh or discordant sound winced as the iron gate jarred against the sidewalkc :  to be out of harmony a course that jarred with his habitual feelings — George Eliot; specifically :  bicker

3. 2 :  to undergo severe vibration

4. transitive verb

5. :  to cause to jar: such asa :  to affect disagreeably :  unsettle The violent opposition jarred his resolve.b :  to make unstable or loose :  shake jar the ball free

1. 1a :  a sudden or unexpected shake jars and joltsb :  an unsettling shock gave her nerves a jarc :  an unpleasant break or conflict in rhythm, flow, or transition works persistently, swiftly, without jar — Sinclair Lewis

2. 2a :  a state or manifestation of discord or conflictb :  a harsh grating sound

archaic

1. :  the position of being ajar —usually used in the phrase on the jar

1. 1 :  a usually glass or pottery container with a wide mouth

2. 2 :  the contents of a jar We ate a jar of pickles.

1. 1 :  to shake or cause to shake hard Jonas was jarred loose and thrown violently into the air. — Lois Lowry, The Giver

2. 2 :  to have a disagreeable effect The music jarred on my ears.

1. 1 :  ²jolt 1 They felt the jar of the plane landing.

2. 2 :  ²shock 1 … the sound of his voice went through me with a jar. — Robert Louis Stevenson, Kidnapped