[1] : The Collaborative International Dictionary of English v.0.48

jar \jar\ jaumr, n. see ajar.
   a turn.

   note: only in phrase.
         1913 webster

   on the jar, on the turn, ajar, as a door.
      1913 webster
see also:
ajar on the jar 

[2] : The Collaborative International Dictionary of English v.0.48

jar \jar\, v. t.
   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.
      1913 webster

   2. to tick; to beat; to mark or tell off. obs.
      1913 webster

            my thoughts are minutes, and with sighs they jar
            their watches on unto mine eyes.      --shak.
      1913 webster

[3] : The Collaborative International Dictionary of English v.0.48

jar \jar\ jaumr, n. f. jarre, sp. jarra, from ar. jarrah
   ewer; cf. pers. 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.
      1913 webster

   2. the measure of what is contained in a jar; as, a jar of
      oil; a jar of preserves.
      1913 webster

   bell jar, leyden jar. see in the vocabulary.
      1913 webster
see also:
bell jar leyden jar 

[4] : The Collaborative International Dictionary of English v.0.48

jar \jar\, n.
   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.
      1913 webster

   2. clash of interest or opinions; collision; discord; debate;
      slight disagreement.
      1913 webster

            and yet his peace is but continual jar. --spenser.
      1913 webster

            cease, cease these jars, and rest your minds in
            peace.                                --shak.
      1913 webster

   3. a regular vibration, as of a pendulum.
      1913 webster

            i love thee not a jar of the clock.   --shak.
      1913 webster

   4. pl. 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.
      1913 webster

[5] : The Collaborative International Dictionary of English v.0.48

jar \jar\, v. i. imp.  p. p. jarred; p. pr.  vb. n.
   jarring. cf. oe. charken to creak, as. cearcian to gnash,
   f. jars a gander, l. garrire to chatter, prate, ohg. kerran
   to chatter, croak, g. quarren to grumble, and e. jargon,
   ajar.
   1913 webster
   1. to give forth a rudely quivering or tremulous sound; to
      sound harshly or discordantly; as, the notes jarred on my
      ears.
      1913 webster

            when such strings jar, what hope of harmony ?
                                                  --shak.
      1913 webster

            a string may jar in the best master's hand.
                                                  --roscommon.
      1913 webster

   2. to act in opposition or disagreement; to clash; to
      interfere; to quarrel; to dispute.
      1913 webster

            when those renowned noble peers greece
            through stubborn pride among themselves did jar.
                                                  --spenser.
      1913 webster

            for orders and degrees
            jar not with liberty, but well consist. --milton.
      1913 webster
see also:
jarred jarring 

[6] : WordNet (r) 2.0

jar
     n 1: a vessel usually cylindrical with a wide mouth and without
          handles
     2: the quantity contained in a jar; "he drank a jar of beer"
        syn: jarful
     3: a sudden impact; "the door closed with a jolt" syn: jolt,
         jounce
     v 1: be incompatible; be or come into conflict; "these colors
          clash" syn: clash, collide
     2: move or cause to move with a sudden jerky motion syn: jolt
     3: shock physically; "georgia was shaken up in the tech game"
        syn: shake up, bump around
     4: affect in a disagreeable way; "this play jarred the
        audience"
     5: place in a cylindrical vessel; "jar the jam"
     also: jarring, jarred
see also:
jarful jolt jounce clash collide shake up 
bump around jarring jarred 

[7] : Moby Thesaurus II by Grady Ward, 1.0

217 moby thesaurus words for "jar":
   babel, discordia, eris, agitate, agitation, agree to disagree, bag,
   barrel, basket, be at cross-purposes, be at variance, belch, blare,
   blat, bob, bobble, bottle, bounce, bowl down, bowl over, box,
   box up, bray, break, break off, bump, burr, buzz, cackle, calabash,
   can, canteen, capsule, carafe, carboy, carton, case, cask, caster,
   caw, chatter, chirr, clamor, clang, clangor, clank, clash,
   clashing, collide, collision, concussion, conflict, contention,
   contradict, counter, crash, crate, craunch, croak, cruet, crump,
   crunch, cruse, decanter, demijohn, didder, differ,
   differ in opinion, disaccord, disaffinity, disagree,
   discombobulate, discompose, disconcert, discord, discordance,
   discordancy, disharmony, disquiet, dissent, disturb, disturbance,
   dither, do up, electrify, encase, encyst, enmity, ewer, falter,
   fifth, flacon, flagon, flask, flasket, fluctuation, flurry,
   fluster, flutter, friction, frighten, fuss, gourd, grate, grate on,
   grimace, grind, groan, growl, grumble, hamper, harshness,
   have an ague, hipflask, hit a clinker, hold opposite views,
   hot-water bottle, hustle, incompatibility, incompatibleness,
   inharmoniousness, inharmony, irritate, jactitate, jangle,
   jangle the nerves, jar on, jerk, jeroboam, jig, jigget, jiggle,
   jog, joggle, jolt, jostle, jounce, jug, jump, lota, magnum,
   mere noise, mischief, mismatch, mismate, misunderstand one another,
   mussuk, negate, noise, noncooperation, not get along, object, olla,
   open conflict, pack, package, parcel, perturb, phial, pot,
   pull different ways, put on edge, put up, quake, quaver, quiver,
   rasp, rattle, rictus, rock, rub, ruffle, sack, scranch, scrape,
   scratch, scrunch, shake, shake up, shiver, shock, shudder, smash,
   snarl, snore, stagger, start, startle, stir, stoup,
   strained relations, stun, sway, take aback, tank, tension, tic,
   tin, tremble, tremor, trouble, turn, twang, twitch, twitter,
   unharmoniousness, unpleasantness, unsettle, unstring, untune,
   upset, vacuum bottle, vary, vial, vibrate, vibration, wobble

[8] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

jar
     java archive java
     
     

[9] : The Free On-line Dictionary of Computing (27 SEP 03)

jar
     
        java archive
     
     
see also:
java archive 

Jar >> J Words
Jar, definition of term: Jar
jar_pag1.html

Leyden Jar >> L Words
Leyden Jar, definition of term: Leyden Jar
leyden+jar_pag1.html

Mason Jar >> M Words
Mason Jar, definition of term: Mason Jar
mason+jar_pag1.html

Earthenware Jar >> E Words
Earthenware Jar, definition of term: Earthenware Jar
earthenware+jar_pag1.html

Canopic Jar >> C Words
Canopic Jar, definition of term: Canopic Jar
canopic+jar_pag1.html

Bell Jar >> B Words
Bell Jar, definition of term: Bell Jar
bell+jar_pag1.html