Definitions

1. noun

a massive star in the constellation Orion, near which a supernova is expected to occur in the near future, currently one of the brightest stars in the night sky

“Betelgeuse is a variable star, and its brightness can vary significantly over a few days.”

2. proper noun

the name of the star in the constellation Orion

“The ancient astronomers knew Betelgeuse as a significant celestial body.”

3. adjective

relating to or characteristic of the star Betelgeuse, especially in its expected supernova

“The Betelgeuse supernova will be a spectacular sight in the night sky.”