Definitions

1. noun

the North Star, a star in the constellation Ursa Minor that is almost aligned with the Earth’s axis of rotation and is therefore visible from most places on the Earth’s surface at night.

“The hikers used the position of Polaris to navigate their way back to camp.”

2. proper noun

the name of a star in the constellation Ursa Minor.

“The astronomers studied the properties of the Polaris star.”