From Longman Dictionary of Contemporary Englishthe Post Officethe Post OfficeTCMSSOthe national organization which is responsible for collecting and delivering letters → post office
Examples from the Corpus
the Post Office• She sent a registered letter and the Post Office sent her his signed receipt for it, dated May 18.• We will set performance targets for the Post Office and ensure they are published in all offices, together with results achieved.• He found him across the street from the post office.• Last month, the Post Office announced it was shedding 15,000 jobs.• I lived outside myself, trying to forget the shin, and think only of the post office at Reggane.• A niece took over the post office when she married, and it was moved to the present premises.• J., last year, when a man shot up the post office in a bizarre robbery. 