n.[C]

1. （常大寫）海軍[G]
   He is an officer in the Navy.

   他是一個海軍軍官。

2. 海軍艦隊

n.

1. [treated as sing. or pl.] the branch of a state's armed services which conducts military operations at sea.
   ▸literary a fleet of ships.
2. (also navy blue) a dark blue colour.