Meaning ofletterbombsin English

Noun

1. viruses hidden in digital files; malicious code
   The company's security team detected letterbombs in several email attachments.
2. explosive devices sent via mail
   The police warned people to be cautious of letterbombs sent through the postal service.
3. dangerous emails or messages (harmful content)
   The email provider blocked several accounts that sent letterbombs to their users.