a hollow device made of metal that makes a ringing sound when struck

a push button at an outer door that gives a ringing or buzzing signal when pushed

the sound of a bell being struck

(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.

the shape of a bell

a percussion instrument consisting of a set of tuned bells that are struck with a hammer; used as an orchestral instrument

the flared opening of a tubular device