Emily Dickinson Lexicon

ajar, adv. /adj. [prothesis; a + char < OE cyrr, a turn; see a jar, adv.] (webplay: door).

1. Unfolded; bent open; [fig.] out of place.
2. Agape; unclosed; partly open; turned open.
3. Unveiled; revealed; visible through an opening; [fig.] awake; astir; accessible; welcoming; inviting an entrance.