/ Dictionary / Index T terreplein: Meaning and Definition of Find definitions for: terre•plein Pronunciation: (ter'plān", ter'u-), [key] — n. Fort. the top platform or horizontal surface of a rampart where guns are mounted. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: terreplein (Thesaurus) terrene terrestrial 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