(dated) A literary man; a scholar or author.

(military, archaic except humorous) A man whose occupation is fighting in wars; a soldier, a warrior.

Alternative form of man-of-war

Of a system: including both human and machine and/or their interface.

(idiomatic) A person who always agrees with their employer or superior.

A man who is wise. / A man who is a sage or seer. / A magus or wizard, now especially one of the three biblical magi.

(historical) A US government agent fighting organized crime in the interwar years. / Any person working for the US government, especially in undercover work.

(bingo) five

(dated) An expression of surprise

(Australia, US, Canada) Someone, usually male, whose job it is to collect refuse from people's homes and take it to be processed.