a region of NE South America, including Guyana, Suriname, French Guiana, and the Guiana Highlands (largely in SE Venezuela and partly in N Brazil). Area: about 1 787 000 sq km (690 000 sq miles)
Guiana in American English
(giˈænə; giˈɑnə)
1.
region in N South America, including Guyana, Suriname, and French Guiana
2.
area including this region, SE Venezuela, & part of N Brazil, bounded by the Orinoco, Negro, & Amazon rivers & the Atlantic Ocean