A scherzo (; ; plural scherzos or scherzi), in western classical music, is a piece of music, often a movement from a larger piece such as a symphony or a sonata. The precise definition has varied over the years, but scherzo often refers to a movement that replaces the minuet as the third movement in a four-movement work, such as a symphony, sonata, or string quartet. Scherzo also frequently refers to a fast-moving humorous composition that may or may not be part of a larger work.