Notes
rock and roll or rock'n'roll
1. (Pop Music)
a. a type of pop music originating in the 1950s as a blend of rhythm and blues and country and western. It is generally based upon the twelve-bar blues, the first and third beats in each bar being heavily accented
b. (as modifier): the rock-and-roll era.
2. (Dancing) dancing performed to such music, with exaggerated body movements stressing the beat.
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