Breadcrumb Home > Thesaurus > P Synonyms of postbox Find synonyms for: Noun 1. postbox, mailbox, letter box, maildrop usage: public box for deposit of mail WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of postbox (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: hagiography Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language