/ Dictionary / Index P Peninsula War: Meaning and Definition of Find definitions for: Penin'sula War" Pronunciation: [key] a war (1808–14) in Spain and Portugal, with British, Spanish, and Portuguese troops opposing the French. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Peninsular State penis Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language