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knapsack

To go hiking while burdened with a knapsack, usually overnight or for longer.

ˈnæpsækCurrent132 viewsLast reviewed Jun 29, 2026+ Add a definition
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UK
#1·Apr 27, 2026UK

To go hiking while burdened with a knapsack, usually overnight or for longer.

My sleeping bag fell off my backpack into the water, while we were knapsacking up the mountain.
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UK
#2·Apr 27, 2026UK

(chiefly, US, dated, _, or, _, archaic, _, in, UK) A case of canvas or leather, for carrying items on the back.

1936, Arthur Ransome, Pigeon Post, ch 3. "All but Nancy carried knapsacks, with sandwiches and thermos flasks of tea. Peggy’s knapsack held Nancy’s provisions as well as her own, for on Nancy’s shoulders, instead of a knapsack, was a pig…
Origin: From or (older form cnapsack), from , ultimately from to eat, crack, of origin, + sack. is from Dutch. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
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UK
#3·Apr 27, 2026UK

(cryptography) A set of values from which a subset is chosen.

The two elder reluctantly left him and walked on, taking their brother's knapsack to relieve him in following, and the youngest entered the field.
For parents

Knapsack means: A set of values from which a subset is chosen.. It is crypto-trading vocabulary; common on X, Discord servers, and trading-Telegram groups your teen may follow. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.

For ESL learners

knapsack means: A set of values from which a subset is chosen.. Register: very informal, crypto/finance subculture. Suitable only for casual conversation, chat and social media. Do not use in business, academic or news writing. A common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; native speakers immediately notice when slang appears in formal contexts, so always check the surrounding register before producing it yourself.

Heard in the wild
  • “i can see it being a problem in like 2016 intersectional knapsack cis privilege checking whatever, but i sense by 2024 not really”

    — Bluesky· May 2026
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