1. (noun)rock 'n' roll, rock'n'roll, rock-and-roll, rock and roll, rock, rock music a genre of popular music originating in the 1950s; a blend of black rhythm-and-blues with white country-and-western Synonyms: rock-and-roll, rockcandy, sway, rock and roll, stone, careen, rock, rock'n'roll, rock music, rock 'n' roll, tilt