Synonyms: detonation, discharge, eruption, ignition, bang, crash, boom, etc.
Definition of explosion
1. an act or instance of exploding; a violent expansion or bursting with noise, as of gunpowder or a boiler (opposed to implosion).
2. the noise itself:
The loud explosion woke them.
3. a violent outburst, as of laughter or anger.
4. a sudden, rapid, or great increase:
a population explosion.
5. the burning of the mixture of fuel and air in an internal-combustion engine.
Kyiv, the Ukrainian capital, was rocked by several explosions. The filmmakers staged the car's explosion. The region has experienced a population explosion. There was complete mayhem after the explosion.