What is the meaning of Sailor?

A person in the business of navigating ships or other vessels

Someone knowledgeable in the practical management of ships.

A member of the crew of a vessel; a mariner; a common seaman.

A person who sails sailing boats as a sport or recreation.

Any of various nymphalid butterflies of the genera Neptis, Pseudoneptis and Phaedyma, having white markings on a dark base and commonly flying by gliding.

Source: wiktionary.org