Definitions:

1. A bomb that uses a fuel-air explosive. NOUN
   • The vacuum bomb's unique design allows it to penetrate deeply into fortifications before detonating.
2. A type of explosive that uses oxygen from the surrounding air to generate a high-temperature explosion. NOUN
   • The use of vacuum bombs in combat has been condemmed as an inhumane weapon.

Synonyms:

• aerosol bomb
• thermobaric weapon