Acting
Acting is an activity in which a story is told by means of its enactment by an actor or actress who adopts a character—in theatre, television, film, radio, or any other medium that makes use of the mimetic mode.
Musical Theatre
Musical theatre is a form of theatrical performance that combines songs, spoken dialogue, acting and dance. The story and emotional content of a musical – humor, pathos, love, anger – are communicated through the words, music, movement and technical aspects of the entertainment as an integrated whole. Although musical theatre overlaps with other theatrical forms like opera and dance, it may be distinguished by the equal importance given to the music as compared with the dialogue, movement and other elements. Since the early 20th century, musical theatre stage works have generally been called, simply, musicals.
Acting
For an actress to be a success she must have the face of Venus, the brains of Minerva, the grace of Terpsichore, the memory of Macaulay, the figure of Juno, and the hide of a rhinoceros.
Ethel Barrymore quoted in George Jean Nathan's The Theatre in the fifties.