revving noun2 •The act by which an engine is revved.[…] 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 •(Internet) 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. formsrevvings