Definition of "revving"

revving

verb
1. present participle and gerund of rev
2. present participle and gerund of revv
noun
countable and uncountable, plural revvings
1. The act by which an engine is revved.
  Quotations
  […] we finally arrived in El Obeid […] after doing the last sixty miles in third gear, with frequent revvings in neutral to keep the engine going.
  1954, Anthony Mann, Where God Laughed: The Sudan Today, page 88
2. (Internet, uncountable) A technique for reducing web page loading times by assigning far-future expiration dates to the resources on the page (so that the browser caches them indefinitely) and, if changes are needed, using different filenames for those resources.