an order
directive, instruction
Cases of word usage
1) an officer in command of a country's warships, or of a fleet or squadron (admiral)
2) an officer in command of a military establishment (commandant)
3) (of a command or power) that must be obeyed (mandatory)
4) a person appointed to command others in the armed forces, the police force etc; a person with a (public) position of authority (officer)
5) (a statement by judge etc of) a punishment; a set of words used to form a statement, question, command etc and, when written, beginning with a capital letter and ending with a full stop, question mark or exclamation mark) (sentence)