Definition of "spelunking" [spelunking]

• The practice or hobby of exploring underground caverns; caving. (noun)
• Present participle of spelunk. (to explore underground caves). (verb)

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• "Edick's background in spelunking no doubt helped a bit."
• "Though I'm a bit disturbed by the idea of spelunking poor Jig..."
• "As you might expect, this involves a certain amount of spelunking, which is not something everyone wants to do."