—v.i. 1. to have a harshly unpleasant or perturbing effect on one's nerves, feelings, thoughts, etc.: The sound of the alarm jarred. 2. to produce a harsh, grating sound; sound discordantly.
3. to vibrate audibly; rattle: The window jarred in the frame. 4. to vibrate or shake.
5. to conflict, clash, or disagree.
—v.t. 1. to cause to rattle or shake.
2. to have a sudden and unpleasant effect upon (the feelings, nerves, etc.): The burglary violently jarred their sense of security. 3. to cause to sound harshly or discordantly.
—n. 1. a jolt or shake; a vibrating movement, as from concussion.
2. a sudden unpleasant effect upon the mind or feelings; shock.
3. a harsh, grating sound.
4. a discordant sound or combination of sounds.
5. a quarrel or disagreement, esp. a minor one.
Pronunciation: ( jär),[key] —n. 1. Archaic.a turn or turning.
2. on the jar, partly opened; ajar: The window was on the jar.