/ Dictionary / Index P peninsula: Meaning and Definition of Find definitions for: pen•in•su•la Pronunciation: (pu-nin'su-lu, -nins'yu-lu), [key] — n. an area of land almost completely surrounded by water except for an isthmus connecting it with the mainland. Spain and Portugal together; Iberian Peninsula; Iberia. a district in SE Virginia between the York and James rivers: Civil War battles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: peninsula (Thesaurus) penicillium Peninsular State 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