Dictionary:

prima ballerina

  (prē'mə)

The leading woman dancer in a ballet company.

[Italian : prima, feminine of primo, first + ballerina, ballerina.]

prima ballerina (It., first dancer). In classical ballet, the female dancer who occupies the top position among dancers in a company. There is only one higher title, that of prima ballerina assoluta, which is very rarely given. The Royal Ballet bestowed this latter title on Margot Fonteyn in 1979, when she was 60.

The leading ballerina in a dance company.

The noun has one meaning:

Meaning #1: a leading female ballet dancer