A maître d', a headwaiter.
An honorific title given to a prominent person. See colonel.
The head boy of a school.
A chief or leader.
An army officer with a rank between the most senior grade of lieutenant and major.
A naval officer with a rank between commander and commodore.
The person lawfully in command of a ship or other vessel.
One of the athletes on a sports team who is designated to make decisions, and is allowed to speak for his team with a referee or official.
A commissioned officer in the United States Navy, Coast Guard, NOAA Corps, or PHS Corps of a grade superior to a commander and junior to a rear admiral (lower half). A captain is equal in grade or rank to a United States Army, Marine Corps, or Air Force colonel.
The leader of a group of workers.
To act as captain
To exercise command of a ship, aircraft or sports team.
A sentry, watch, or guard.
A unique string of characters recognised by a computer program for processing in a special way; a keyword.
A sentinel crab.
A sign of a health risk (e.g. a disease, an adverse effect).
To post as guard.
To post a guard for.
To watch over as a guard.