/ Dictionary / Index S Seyhan: Meaning and Definition of Find definitions for: Sey•han Pronunciation: (sā-hän'), [key] — n. Adana. a river in S central Turkey, flowing S from the Anatolia plateau to the Mediterranean Sea. 748 mi. (1204 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: seyhan (Thesaurus) Seyfert galaxy Seymour Related Content Daily Word Quiz: ablution Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language