[あく, aku](v5k, vi) (1) (esp. 開く) to open (e.g. doors); (2) (esp. 開く) to open (e.g. business, etc.); (3) (esp. 空く) to be empty; (4) (esp. 空く) to be vacant; to be available; to be free; (5) (esp. 明く) to be open (e.g. neckline, etc.); (6) (esp. 明く) to have been opened (of one's eyes, mouth, etc.); (7) (esp. 明く) to come to an end; (v5k, vt) (8) (esp. 明く) to open (one's eyes, mouth, etc.); (v5k, vi) (9) (See 穴が開く) to have a hole; to form a gap; to have an interval (between events); (P)#7332[Add to Longdo]