means The first public showing or performance of a film, play, or other work — its official debut.

from From French première, the feminine of premier, "first" — itself descended from Latin primarius, "of the first rank," built on primus, "first." The same Latin root branches into prime, primary, and primitive. English borrowed the theatrical sense whole from French, where une première still means an opening night, keeping a faint scent of red carpets and Parisian footlights.