v.1. To cause a machine to start working by or as if by turning a crank: The mechanic cranked up the antique car to show us how it worked. We waved goodbye as the pilot cranked the engines up.
2. To put something into action: The producers cranked up a massive publicity campaign before releasing the film.
3. To motivate someone: I could barely crank myself up to get to school this morning. An emcee came out before the performance and cranked up the crowd.
4. To cause something to intensify, as in volume or force: I cranked up the stereo when my favorite song came on. We cranked the motor up to 4200 rpm.