/ Dictionary / Index I invincible: Meaning and Definition of Find definitions for: in•vin•ci•ble Pronunciation: (in-vin'su-bul), [key] — adj. incapable of being conquered, defeated, or subdued. insuperable; insurmountable: invincible difficulties. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: invincible (Thesaurus) invigorate Invincible Armada Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language