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