[gee-an-uh, -ah-nuh, gahy-an-uh] 
| 1. | a vast tropical region in NE South America, bounded by the Orinoco, Negro, and Amazon rivers and the Atlantic. ab. 690,000 sq. mi. (1,787,000 sq. km). |
| 2. | the coastal portion of this region, which includes Guyana, French Guiana, and Suriname. 1,263,200; 175,275 sq. mi. (453,962 sq. km). |
| Gui·an·a (gē-ān'ə, -ä'nə, gī-) A region of northeast South America including southeast Venezuela, part of northern Brazil, and French Guiana, Suriname, and Guyana. |
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