Perpetuum mobile

In music, ''perpetuum mobile'' (English pronunciation /pərˌpɛtjʊəm ˈmoʊbɪleɪ/, /ˈmoʊbɪli/; literally, "perpetual motion"), ''moto perpetuo'' (Italian), ''mouvement perpétuel'' (French), ''movimento perpétuo'' (Portuguese) ''movimiento perpetuo'' (Spanish), carries two distinct meanings: first, as describing entire musical compositions or passages within them that are characterised by a continuous stream of notes, usually but not always at a rapid tempo; and also as describing entire compositions, or extended passages within them that are meant to be played in a repetitious fashion, often an indefinite number of times. Provided by Wikipedia