1510s, "officer who has charge of a post-station and provides post-horses," from post (n.3) + master (n.). Later "official who has superintendence of a post office." Postmaster general "chief of a postal system" is by 1620s.
post-impressionism
Post-it
postlude
postman
postmark
postmaster
post-millennial
postmistress
post-modern
postmodernism
post-mortem
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}