/ Dictionary / Index C Carmarthen: Meaning and Definition of Find definitions for: Car•mar•then Pronunciation: (kär-mär'un), [key] — n. a seaport in Dyfed, in S Wales. 49,900. Carmarthenshire. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Carmania Carmarthenshire Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language