Definition of "four-cycle" []

• Requiring four strokes of the piston for a cycle: a four-cycle internal-combustion engine. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Challenges included developing a light four-cycle engine and an autopilot calibrated by GPS."
• "This four-cycle model can easily be reconciled the observations of the Schlesingers, Klingberg and others if we collapse the four into two."
• "Other impressive models so far include the 26-inch Yard Machines 31AM63EF700, $700, and 24-inch Craftsman 88955, $580, both four-cycle, two-stage models made by MTD."