1. plural of knapsack; bags carried on the back, typically used for hiking or traveling

Examples

• The hikers packed their knapsacks with water and snacks.
• Students carried heavy knapsacks filled with textbooks.
• The scouts organized their knapsacks before the camping trip.
• Military personnel use sturdy knapsacks for field operations.
• She bought two new knapsacks for the family vacation.
• The store sells various sizes of knapsacks for different activities.