Spectacle

Noun

1. An exciting or extraordinary scene, exhibition, performance etc.

   "The horse race was a thrilling spectacle."

2. An embarrassing or unedifying scene or situation.

   "He made a spectacle out of himself."

3. Attributive form of spectacles.
4. The brille of a snake.
5. A frame with different coloured lenses on a semaphore signal through which light from a lamp shines at night, often a part of the signal arm.