Meaning ofletterbombin English

Noun

1. a virus in an email attachment; malicious code
   The company's email server was attacked by a letterbomb that destroyed important data.
2. a mailed explosive device
   The police warned people to be cautious of letterbombs sent through the postal service.
3. a harmful email or message (electronic attack)
   The hacker sent a letterbomb to the company's website, causing it to crash.