Long period at the top of eg show business

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
I. noun EXAMPLES FROM CORPUS ▪ I know he talked to her about what it was like before Jett hit the big time . ▪ It has taken him just five and a half years to make his mark in the big time . ▪ Lennie knows he hasn't any time to play with if Boro are to stay ...

Wikipedia Word definitions in Wikipedia
Big Time is a 1929 film starring Lee Tracy and Mae Clarke as a show business couple who break up over his infidelity. This was Clarke's film debut. Director Kenneth Hawks was Howard Hawks ' brother.

WordNet Word definitions in WordNet
n. the highest level of an occupation (especially in entertainment)

Wiktionary Word definitions in Wiktionary
n. The highest, or most prestigious level in any field, especially in entertainment.