Definition of rock and roll:
°Style of music characterized by a basic drum-beat, generally 4/4 riffs, based on (usually electric) guitar, drums, and vocals (generally with bass guitar). Generally used to refer to the 1950's rock, and rock of its style, quite close to swing.
°Style of vigorous dancing associated with this 1950's music.
Definition of rock and roll:
°Style of music characterized by a basic drum-beat, generally 4/4 riffs, based on (usually electric) guitar, drums, and vocals (generally with bass guitar). Generally used to refer to the 1950's rock, and rock of its style, quite close to swing.
°Style of vigorous dancing associated with this 1950's music.