(of a door or other opening) slightly open (门或其他开口处)半开的,微开的 [as adv.]the home help had left the window ajar that morning. 家政服务员那天早上让窗子半开着。 [as predic. adj]the door to the sitting room was ajar. 通往起居室的门虚掩着。
语源
late 17th cent.: from a- 'on' + obsolete char (Old English cerr) 'a turn, return'