South Vietnam
noun
1.
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.
Capital:
Saigon.
Compare
North Vietnam
,
Vietnam
.
British Dictionary definitions for
South Vietnam
South Vietnam
noun
1.
a former republic (1955–76) occupying the S of present-day Vietnam on the South China Sea and the Gulf of Thailand