massmailing
nounUK /ˈmæsˌmeɪlɪŋ/
US /ˈmæsˌmeɪlɪŋ/
Sending the same letter or message to a very large group of people all at once.
The school used massmailing to tell every family about the snow day.
RELATED WORDS
OTHER MEANINGS
2. A single message sent to many recipients at the same time.
I found the party invitation in my inbox as part of a massmailing.
3. The practice of sending advertising or announcements to large numbers of addresses.
The company's massmailing filled our mailbox with catalogs every week.
4. Sending identical physical letters or packages to many addresses in one batch.
The charity saved money by doing one massmailing instead of many small ones.