ajar

adjective, adverb

1. neither entirely open nor entirely shut; partly open: The door was ajar.

adverb, adjective

1. in contradiction to; at variance with: a story ajar with the facts.

adjective, adverb (postpositive)

1. (esp of a door or window) slightly open

adjective

1. (postpositive) not in harmony

1718, perhaps from Scottish dialectal a char “slightly open,” earlier on char (early 16c.), from Middle English char, from Old English cier “a turn.”