Source : Webster's Revised Unabridged Dictionary (1913)

Ajar \A*jar"\, adv. [OE. on char ajar, on the turn; AS. cerr,
   cyrr, turn, akin to G. kehren to turn, and to D. akerre. See
   {Char}.]
   Slightly turned or opened; as, the door was standing ajar.

Ajar \A*jar"\, adv. [Pref. a- + jar.]
   In a state of discord; out of harmony; as, he is ajar with
   the world.

Source : WordNet®

ajar
     adj : slightly open; "the door was ajar" [syn: {ajar(p)}]