- a person who explores caves, especially as a hobby.
Origin of spelunker
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a person whose hobby is the exploration and study of caves
C20: from Latin spēlunca, from Greek spēlunx a cave
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for spelunker
"a cave bug; one who explores caves as a hobby," 1942, agent noun formed from obsolete spelunk "cave, cavern."
Online Etymology Dictionary, © 2010 Douglas Harper