/ Dictionary / Index S spelunk: Meaning and Definition of Find definitions for: spe•lunk Pronunciation: (spi-lungk'), [key] — v.i. to explore caves, esp. as a hobby. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spelunk (Thesaurus) spelter spelunker Related Content Daily Word Quiz: sylvan Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language