/ Dictionary / Index I Istanbul: Meaning and Definition of Find definitions for: Is•tan•bul Pronunciation: (is"tän-bl', -tan- is'tän-b&oobrevel", -tan- Turk. is-täm'b&oobrevel), [key] — n. a port in NW Turkey, on both sides of the Bosporus: built by Constantine I on the site of ancient Byzantium; capital of the Eastern Roman Empire and of the Ottoman Empire; capital removed to Ankara 1923. 5,494,900. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: istanbul (Thesaurus) Istambuli istesso tempo, l' 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