/ Dictionary / Index M Mekong: Meaning and Definition of Find definitions for: Me•kong Pronunciation: (mā'kong' Thai. ma&sylpkōng'), [key] — n. a river whose source is in SW China, flowing SE along most of the boundary between Thailand and Laos to the South China Sea. 2600 mi. (4200 km) long. Chinese, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mekong (Thesaurus) Meknès Mekong Delta Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language