Definition: A "post office" is a place where people can send and receivemail, suchasletters and packages. It is alsopart of a largerorganizationcalled the postal service that takescare of deliveringmailacross the country.
Noun
a children'sgame in which kissesareexchanged for pretendedletters
an independent agency of the federal governmentresponsible formaildelivery (and sometimes telecommunications) betweenindividuals and businesses in the United States