a person who works on a ship, especially one who is not an officer

a person who often takes part in the sport of using boats with sails

someone who is not/often ill when travelling by boat

I wasn't a good sailor at the best of times and the sea was very choppy that day.

Sorry, but I'm not the best sailor. I would rather take a train up the coast, if possible.

Don't worry about me - I'm a good sailor.

I'd never go by boat - I'm a bad sailor.

He wants to join the navy? As bad a sailor as he is?

My brother, who's a bad sailor, was vomiting over the side of the boat.