Definition of "perpetual" []

• Lasting for eternity. (adjective)
• Continuing or lasting for an indefinitely long time. (adjective)
• Instituted to be in effect or have tenure for an unlimited duration: a treaty of perpetual friendship. (adjective)
• Continuing without interruption. See Synonyms at continual. (adjective)
• Flowering throughout the growing season. (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.

• "We have heard from time to time of the term perpetual motion."
• "Taken literally, the term perpetual motion refers to movement that goes on forever."
• "There are often humorous passages, for the Altrurians are inextinguishably amused by our illogicality, and what they call the perpetual _non sequiturs_ of our lives and laws."