knapsack Meaning, Definition & Usage

  1. noun a bag carried by a strap on your back or shoulder
    packsack; back pack; haversack; backpack; rucksack.

WordNet

Knap"sack` noun
Etymology
D. knapzak; knappen to eat + zak a bag. See Knap, v. t., and Sack.
Definitions
  1. A case of canvas or leather, for carrying on the back a soldier's necessaries, or the clothing, etc., of a traveler.
    And each one fills his knapsack or his scrip With some rare thing that on the field is found. Drayton.

Webster 1913