Admiral Nimitz ad·mi·ral·nimitz uncommon noun 1. United States admiral of the Pacific fleet during World War II who used aircraft carriers to destroy the Japanese navy (1885-1966) SynonymsNimitzChester NimitzChester William NimitzAdmiral Nimitz Related words Broader terms naval officer WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.