Situated largely on the Caribbean Plate, the region comprises more than 700 islands, islets, reefs and cays. (See the list.) These islands generally form island arcs that delineate the eastern and northern edges of the Caribbean Sea. The Caribbean islands, consisting of the Greater Antilles on the north and the Lesser Antilles on the south and east (including the Leeward Antilles), are part of the somewhat larger West Indies grouping, which also includes the Lucayan Archipelago (comprising the Bahamas and Turks and Caicos Islands). The Lucayans and, less commonly, Bermuda, are also sometimes considered Caribbean despite the fact that none of these islands border the Caribbean Sea. In a wider sense, the mainland countries, regions, and territories of Belize, the Caribbean region of Colombia, Cozumel, the Yucatán Peninsula, Margarita Island, the Guyanas (Guyana, Suriname, French Guiana, Guayana Region in Venezuela, and Amapá in Brazil), are often included due to their political and cultural ties with the region.
Geopolitically, the Caribbean islands are usually regarded as a subregion of North America and are organized into 30 territories including sovereign states, overseas departments, and dependencies. From December 15, 1954, to October 10, 2010, there was a country known as the Netherlands Antilles composed of five states, all of which were Dutch dependencies. From January 3, 1958, to May 31, 1962, there was also a short-lived political union called the West Indies Federation composed of ten English-speaking Caribbean territories, all of which were then British dependencies. The West Indies cricket team continues to represent many of those nations.
The two most prevalent pronunciations of "Caribbean" outside the Caribbean are // (karr-ə-BEE-ən), with the primary stress on the third syllable, and // (kə-RIB-ee-ən), with the stress on the second. Most authorities of the last century preferred the stress on the third syllable. This is the older of the two pronunciations, but the stressed-second-syllable variant has been established for over 75 years. It has been suggested that speakers of British English prefer // (karr-ə-BEE-ən) while North American speakers more typically use // (kə-RIB-ee-ən), but major American dictionaries and other sources list the stress on the third syllable as more common in American English too. According to the American version of Oxford Online Dictionaries, the stress on the second syllable is becoming more common in UK English and is increasingly considered "by some" to be more up to date and more "correct".
The Oxford Online Dictionaries claim that the stress on the second syllable is the most common pronunciation in the Caribbean itself, but according to the Dictionary of Caribbean English Usage, the most common pronunciation in Caribbean English is in fact on the first syllable, // (KARR-ə-bee-ən).