Dictionary and Thesaurus

Definition of Istanbul

• (noun) the largest city and former capital of Turkey; rebuilt on the site of ancient Byzantium by Constantine I in the fourth century; renamed Constantinople by Constantine who made it the capital of the Byzantine Empire; now the seat of the Eastern Orthodox Church

Synonyms of Istanbul

• Istanbul
• Stambul
• Stamboul
• Constantinople

Antonyms of Istanbul

Homophones of Istanbul