/ˈneɪvi ||; ˈnevɪ/noun [C] (plural navies) the part of a country's armed forces that fights at sea in times of war 海军: to join the navy 参加海军Their son is in the Navy. 他们的儿子在海军服役。 When it is used in the singular Navy can take either a singular or a plural verb The Navy is/are introducing a new warship this year. Look at army, air force and the merchant navy. 作单数时，Navy可带单数或复数动词：The Navy is／are introducing a new warship this year.今年海军要采用一种新式战舰。参看army、air force及the merchant navy。 ☞adjective naval 形容词为naval