n1. (Historical Terms) (in Britain until 1969) the department of the central government that provided postal and telephone services2. (Communications & Information) the main post office in a locality
gen′eral post′ of`fice
n. (in the U.S. postal system) the main post office of a city, county, etc., that also has branch post offices. Abbr.: G.P.O., GPO [1650–60]TranslationsAcronymsSeeGPO