A musical pause is a brief interruption in the flow of music. The most common terms for this are 'REST' (4 letters), 'fermata' (7 letters), and 'cesura' (6 letters). A REST is a period of silence indicated by a symbol in the sheet music, while a fermata is a pause of indefinite length, usually indicated by a curved line over the note. A cesura is a pause of varying length, usually indicated by a double vertical line in the sheet music.