Origin of one-acter
Examples from the Web for one-act
In addition to his longer plays, Tennessee Williams wrote dozens of one-act plays, short stories, and novels.
A short-story is not a condensed novel any more than a one-act play is a condensed full-length play.One-Act Plays|Various
"Here's a new 'situation' for a one-act farce," he said, gloomily, to his next patient when Bibbs had gone.The Turmoil|Booth Tarkington
Three one-act operas by Puccini have been composed for performance at one sitting.The Complete Opera Book|Gustav Kobb