noun
a metal loop with a spring-loaded gate used to quickly and reversibly connect components
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The hiker securely attached their water bottle to their backpack with a carabiner.
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I always keep a carabiner on my keychain for easy access.
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I love how versatile carabiners are - they come in handy for so many things.
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She used the carabiner as a metaphor for how she wanted to stay connected with her friends.