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Micronesia

American  
[mahy-kruh-nee-zhuh, ‑shuh] / ˌmaɪ krəˈni ʒə, ‑ʃə /

noun

  1. one of the three principal divisions of Oceania, comprising the small Pacific islands north of the equator and east of the Philippines, whose main groups are the Mariana Islands, the Caroline Islands, and the Marshall Islands.

  2. Federated States of Micronesia, a group of islands in the western Pacific, in the Caroline Islands, comprising the islands of Pohnpei, Truk, Yap, and Kosrae: formerly a part of the Trust Territory of the Pacific Islands and now a self-governing area associated with the United States. 271 square miles (701 square kilometers).


Micronesia British  
/ ˌmaɪkrəʊˈniːzɪə /

noun

  1. one of the three divisions of islands in the Pacific (the others being Melanesia and Polynesia); the NW division of Oceania: includes the Mariana, Caroline, Marshall, and Kiribati island groups, and Nauru Island

  2. an island group in the W Pacific, formerly within the United States Trust Territory of the Pacific Islands: comprises the islands of Truk, Yap, Ponape, and Kosrae: formed in 1979 when the islands became self-governing: status of free association with the US from 1982. Languages: English and Micronesian languages. Religion: Christian majority. Currency: US dollar. Capital: Palikir. Pop: 106 104 (2013 est)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Micronesia

C19: from micro- + Greek nēsos island; so called from the small size of many of the islands; on the model of Polynesia

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

On the military front, the U.S. is building a radar system in Palau, operates a missile range in the Marshall Islands and is upgrading infrastructure in Micronesia.

From The Wall Street Journal • Jan. 19, 2026

The US, for example, has struck a similar deal with the Pacific nations of Palau, Micronesia and the Marshall Islands - all independent countries that give the US access to defence rights.

From BBC • Jan. 7, 2026

"Coconuts and coconut trees are deeply woven into the lives and livelihoods of Pacific peoples and communities, symbolizing resilience, and sustenance" said Elizabeth Terk, Micronesia conservation director for The Nature Conservancy.

From Science Daily • Dec. 4, 2024

In all, China operates at least 249 flagged-in vessels, including ones that fish off the coasts of Micronesia, Kenya, Ghana, Senegal, Morocco and Iran.

From Los Angeles Times • Aug. 4, 2024

So was the support of Hawaiian missionaries, whether sent to Micronesia, or to the Marquesas Islands.

From The Oahu College at the Sandwich Islands by Trustees of the Punahou School

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