Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun letter_box

3 senses of letter box

Sense 1
Post-Office box, PO Box, POB, call box, letter box -- (a numbered compartment in a post office where mail is put to be called for)
       => compartment -- (a space into which an area is subdivided)

Sense 2
postbox, mailbox, letter box -- (public box for deposit of mail)
       => maildrop -- (a drop where mail can be deposited)

Sense 3
mailbox, letter box -- (a private box for delivery of mail)
       => box -- (a (usually rectangular) container; may have a lid; "he rummaged through a box of spare parts")