Definitions

1. proper noun

a star in the constellation Piscis Austrinus, known for having one of the brightest exoplanets, HD 190429A b

“The astronomer studied the properties of Fomalhaut and its nearby exoplanet.”

2. noun

a point in the sky, specifically a bright star in Piscis Austrinus

“Fomalhaut is a prominent star in the southern hemisphere.”