The Short Symphony or Symphony No. 2 by American composer Aaron Copland is a symphony completed in 1933. The work is dedicated to Copland's friend, the Mexican composer and conductor Carlos Chávez. The symphony is significant as it demonstrates a movement in Copland's style towards polytonality and serialism. It also incorporates influences from the composer's past travels. The symphony was not widely performed in Copland's lifetime, largely due to its rhythmic difficulties. Nevertheless, Copland thought of the Short Symphony as "one of the best things I ever wrote".