Webster's Revised Unabridged Dictionary · 1913

Jar

Jar (jar) , noun

[See Ajar.]

[Only in phrase.]

A turn.
Collocations (1)
On the jar , on the turn, ajar, as a door.

Jar (jar) , noun

[French jarre, Sp. jarra, from Arabic jarrah ewer; compare Persian jarrah.]

1.
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. — Dryden
2.
The measure of what is contained in a jar; as, a jar of oil; a jar of preserves.
Collocations (1)
Bell jar or Leyden jar , See in the Vocabulary.

Jar , intransitive verb

[Compare Old English charken to creak, Anglo-Saxon cearcian to gnash, French jars a gander, Latin garrire to chatter, prate, Old High German kerran to chatter, croak, German quarren to grumble, and English jargon, ajar.]

1.
To give forth a rudely quivering or tremulous sound; to sound harshly or discordantly; as, the notes jarred on my ears.
When such strings jar, what hope of harmony? — Shakespeare
A string may jar in the best master's hand. — Roscommon
2.
To act in opposition or disagreement; to clash; to interfere; to quarrel; to dispute.
When those renowned noble peers Greece Through stubborn pride among themselves did jar. — Spenser
For orders and degrees Jar not with liberty, but well consist. — Milton

Jar , transitive verb

1.
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.
2.
To tick; to beat; to mark or tell off. [Obsolete]
My thoughts are minutes, and with sighs they jar Their watches on unto mine eyes. — Shakespeare

Jar , noun

1.
A rattling, tremulous vibration or shock; a shake; a harsh sound; a discord; as, the jar of a train; the jar of harsh sounds.
2.
Clash of interest or opinions; collision; discord; debate; slight disagreement.
And yet his peace is but continual jar. — Spenser
Cease, cease these jars, and rest your minds in peace. — Shakespeare
3.
A regular vibration, as of a pendulum.
I love thee not a jar of the clock. — Shakespeare
4.
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.