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Definition of "backpack" []

  • A knapsack, often mounted on a lightweight frame, that is worn on a person's back, as to carry camping supplies. (noun)
  • A piece of equipment, often containing life-support devices, designed to be used while being carried on the back: a parachute in a backpack; an astronaut's backpack. (noun)
  • To hike while carrying a backpack. (verb-intransitive)
  • To carry in a backpack. (verb-transitive)

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.

Use "backpack" in a sentence
  • "Actually, my backpack is a carry-on or “hand luggage”."
  • "June 4th, 2010 at 7: 50 am drugs in backpack in: Science & Technology News"
  • "No Daddy following you around to be sure your backpack is fully loaded."