/ Dictionary / Index S South Vietnam: Meaning and Definition of Find definitions for: South' Vietnam' Pronunciation: [key] a former country in SE Asia that comprised Vietnam S of about 17° N latitude; a separate state 1954–75; now part of reunified Vietnam. Cap.: Saigon. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. South Temperate Zone southward Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language