Meaning of backpack

back•pack

Pronunciation: (bak'pak"), [key]
— n.
  1. a pack or knapsack, often of canvas or nylon, to be carried on one's back, sometimes supported on a lightweight metal frame strapped to the body.
  2. a piece of equipment designed to be used while being carried on the back.
—v.i.
  1. to go on a hike, using a backpack: We went backpacking in the Adirondacks.
—v.t.
  1. to place or carry in a backpack or on one's back.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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