From Longman Dictionary of Contemporary Englishprivateerpri‧va‧teer /ˌpraɪvəˈtɪə $ -ˈtɪr/ noun [countable] 1 TTWan armed ship in the past that was not in the navy but attacked and robbed enemy ships carrying goods2 SCCsomeone who sailed on a privateer
Examples from the Corpus
privateer• Half a page of ships captured by Rebel privateers.