Istanbul

American  

[is-tahn-bool, -tan-, is-tahn-bool, -tan-, is-tahm-bool] / ˌɪs tɑnˈbul, -tæn-, ˈɪs tɑnˌbʊl, -tæn-, ɪsˈtɑm bʊl /

Also Stamboul.

noun

1. a port in northwestern 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.

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Istanbul British  

/ ˌɪstænˈbuːl /

noun

1. Former name (330–1926): Constantinople.  Ancient name: Byzantium.  a port in NW Turkey, on the western (European) shore of the Bosporus: the largest city in Turkey; founded in about 660 _bc by Greeks; refounded by Constantine the Great in 330 _ad as the capital of the Eastern Roman Empire; taken by the Turks in 1453 and remained capital of the Ottoman Empire until 1922; industrial centre for shipbuilding, textiles, etc. Pop: 9 760 000 (2005 est))

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Istanbul Cultural  

1. Largest city in Turkey, located in the northwestern part of the country on both sides of the Bosporus.

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Formerly called Byzantium, then Constantinople, the city was the capital consecutively of the eastern branch of the Roman Empire, of the Byzantine Empire, and of the Ottoman Empire.

It is the seat of the Eastern Orthodox Church.

Example Sentences

He is going on an Eastern Mediterranean cruise in a few weeks, from Athens to Istanbul, with stops at several Greek islands and several stops in Turkey, but “I’m not canceling it.”

From Barron's • Mar. 23, 2026

Neighboring Turkey, with its large Iranian community and major global airport in Istanbul, is a key transit point.

From The Wall Street Journal • Mar. 22, 2026

It was the summer of 2016, and my family and I were travelling back to the States from Bangladesh — an arduous 23-hour-long journey that was further extended by a 12+ hour layover in Istanbul.

From Salon • Mar. 21, 2026

A 12-hour layover in Istanbul, a summer abroad in Paris, a weekend trip to Athens from London, a visit to a friend in Seoul.

From Los Angeles Times • Mar. 12, 2026

Robbie had put down his trowel and stood to roll a cigarette, a hangover from his Communist Party time—another abandoned fad, along with his ambitions in anthropology, and the planned hike from Calais to Istanbul.

From "Atonement" by Ian McEwan