The privateer is a licensed, the pirate an unlicensed, plunderer; but plunder, not patriotism, being, as a rule, the motive of the former, it is not perhaps surprising that, failing legitimate prey, he has sometimes adopted, to a great extent, the tactics of the latter.
Source: tatoeba (10797998)
Greetings, privateer.
Source: tatoeba (11510888)
Kidd soon threw off the character of a privateer and became a pirate.
Source: wiktionary
This is a major victory, not only for CUPW because it will deter profit-hungry privateers from taking work away from CUPW members, but also because it gives union protection to those employed by the privateers.