n. 1. One who has charge of a station for the accommodation of travelers; one who supplies post horses. [ 1913 Webster ]
2. One who has charge of a post office, and the distribution and forwarding of mails. [ 1913 Webster ]
n.; pl. Postmasters-general. The chief officer of the post-office department of a government. In the United States the postmaster-general is a member of the cabinet. [ 1913 Webster ]
n. The office of postmaster. [ 1913 Webster ]