(uncountable)Fame, renown; the state of being famous or talked-about. [from 17th c.]
A person who has a high degree of recognition by the general population for his or her success or accomplishments; a famous person (Wikipedia). [from 19th c.]
“It is hard to get people to contribute to a charity unless that charity is fronted by a big-name celebrity.”
“He glanced at Joanie, who was apparently spellbound by the celebrity in the room, the man who at that moment lifted the bottle and refreshed her glass.”
“His second career was in journalism, a field in which he achieved overnight celebrity as a war correspondent.”