n.
One who explores caves chiefly as a hobby; a caver.
[From obsolete spelunk, cave, from Middle English, from Old French spelunque, from Latin spēlunca, from Greek spēlunx.]
spelunking spe'lunk'ing n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
