/ Dictionary / Index E extensible: Meaning and Definition of Find definitions for: ex•ten•si•ble Pronunciation: (ik-sten'su-bul), [key] — adj. capable of being extended. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: extensible (Thesaurus) extender extensile Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language