Breadcrumb Home > Thesaurus > M Synonyms of mailbox Find synonyms for: Noun 1. mailbox, letter box, box usage: a private box for delivery of mail 2. 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 mailbox (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: calumny Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language