A sailor is someone who works or travels by sea. You might think of them as being on a big ship.
In everyday life, people often talk about sailors when they mention work at sea or travel to far-off places. If you know someone who loves sailing or has been on a long ocean voyage, they might be called a sailor. For example, if your friend just got back from a year-long trip around the world on a sailboat, you could say "Your friend is a sailor now." You also hear sailors talked about in news stories when there's an issue with a ship or its crew. This usually means that someone who works on a boat is involved, whether they're traveling for work or pleasure.
A person in the business of navigating ships or other vessels
