n. a hollow device made of metal that makes a ringing sound when struck
n. the sound of a bell being struck
n. (nautical) each of the eight half-hour units of nautical time signaled by strokes of a ship's bell; eight bells signals 4:00, 8:00, or 12:00 o'clock, either a.m. or p.m.
n. the shape of a bell
n. 铃, 钟
[计] 响铃命令