rock & roll

Noun

rock and roll (uncountable)

1. A genre of popular music that evolved in the 1950s from a combination of rhythm and blues and country music, characterized by electric guitars, strong rhythms, and youth-oriented lyrics.
2. A style of vigorous dancing associated with this genre of music.
3. (attributive, especially) An intangible feeling, philosophy, belief or allegiance relating to rock music, characterized by unbridled enthusiasm, hedonism, and cynical regard for authoritarian bodies.
   • rock and roll lifestyle
4. (Cockney, slang) Dole, payment by the state to the unemployed.
   • I'm back on rock and roll
5. (US, slang) The full automatic fire capability selection on a selective fire weapon.
6. The ability to run the picture and audio back and forth in synchronization, allowing the correction of mistakes during dubbing.
   • The dubbing theatre is a viewing theatre equipped for running the picture with a great many tracks interlocked to run synchronously. Once laced up, they can be run forwards or backwards remaining in synch; when it was first introduced this system was given the name 'rock and roll'.2004, Robert Angell, Getting Into Films & Television, page 56

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