Stellar means to do with the stars, or outstandingly good. Stellar evolution, a stellar performance, stellar reviews.
The praise sense is the commoner in ordinary speech and is worn thin by overuse. In astronomy it is plain description, where stellar evolution is the life cycle of a star from formation to collapse.
1adjectivestellarTo do with the stars, or outstandingly good.
“She gave a stellar performance and won the award for best actress.”
stellar is a quality.
Latin
stēllāris
English, today
stellar
Borrowed from Latin stēllāris.
Etymology from Wiktionary, CC BY-SA