take charge of a certain job; occupy a certain work place(verb.social)
Example: Mr. Smith manned the reception desk in the morning.
source: wordnet30
provide with workers(verb.competition)
Example: We cannot man all the desks.
Students were manning the booths.
source: wordnet30
To supply with men; to furnish with a sufficient force or complement of men, as for management, service, defense, or the like; to guard; as, to man a ship, boat, or fort.(verb)