# spelunking

> English word · Noun · frequency rank #96,505

## Definitions
1. The practice or hobby of exploring underground caverns.

## Etymology
From spelunk + -ing. Back-formation from spelunker. Attested since 1946.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/spelunking