From WordNet (r) 3.0 (2006) [wn]:
Cuba
n 1: a communist state in the Caribbean on the island of Cuba
[syn: Cuba, Republic of Cuba]
2: the largest island in the West Indies
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Cuba \Cuba\ (k[=u]"b[.a]), prop. n.
1. a country on the island of Cuba.
[WordNet 1.5]
2. the largest island in the West Indies.
[WordNet 1.5]