The term 'PERFORMED IN A CHORUS' can be summarized by the solution SANG, which is a 4-letter word. Singing is an activity that has been around for centuries and is often done in a group setting, such as a chorus. Choruses are typically made up of multiple singers who harmonize together to create a beautiful sound. Singing in a chorus requires skill and practice, as each singer must be able to match their voice to the other singers in order to create a unified sound.