general post office: Meaning and Definition of

gen'eral post' of"fice

Pronunciation: [key]
  1. (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
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.