Undelivered mail Synonyms

We can't find synonyms for the phrase "Undelivered mail", but we have synonyms for terms, you can combine them.

Undelivered Synonyms

Mail Synonyms

UM abbreviation

UM is an abbreviation for Undelivered Mail
What does UM stand for?
UM stands for "Undelivered Mail"

Definitions for Mail


  • (noun) communications or parcels sent or carried through the postal system
  • (verb) to send through the postal system
  • (noun) the bags of letters and packages that are transported by the postal service