[ fawr-sahy-kuh l, fohr- ]
/ ˈfɔrˌsaɪ kəl, ˈfoʊr- /


noting or pertaining to an internal-combustion engine in which a complete cycle in each cylinder requires four strokes, one to draw in air or an air-fuel mixture, one to compress it, one to ignite it and do work, and one to scavenge the cylinder.

Nearby words

  1. four-color,
  2. four-color problem,
  3. four-color process,
  4. four-colour,
  5. four-corners,
  6. four-deal bridge,
  7. four-dimensional,
  8. four-door,
  9. four-eyed,
  10. four-eyed fish

Compare two-cycle.

Origin of four-cycle

First recorded in 1905–10 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for four-cycle

British Dictionary definitions for four-cycle



US and Canadian relating to or designating an internal-combustion engine in which the piston makes four strokes for every explosionEquivalent term (in Britain and certain other countries): four-stroke Compare two-stroke
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012