(n.) The first or chief female singer in an opera.

Heldentenor Meistersinger alto aria singer baritenor baritone bass basso basso buffo basso cantante basso profundo blues singer canary cantatrice cantor caroler chanter chantress chief coloratura soprano comic bass contralto countertenor crooner danseur noble deep bass diva dramatic soprano electronics king feature attraction first tragedian headliner heavy lead hero heroic tenor heroine honcho hymner improvisator jeune premier king lead lead singer leading lady leading light leading man lieder singer luminary master spirit melodist mezzo-soprano opera singer paramount prima ballerina principal protagonist psalm singer rock-and-roll singer singer singstress songbird songster songstress soprano star superstar tenor top dog torch singer vocalist vocalizer voice warbler yodeler