a loud sound and the energy produced by something such as a bomb bursting into small pieces [↪ explode]
Several people were injured in a bomb explosion.
We heard a loud explosion.
huge/massive etc explosion
A massive explosion ripped through the building.
2 [uncountable and countable]SCB
a process in which something such as a bomb is deliberately made to explode:
Police carried out a controlled explosion of the device.
a sudden or quick increase in the number or amount of something:
the population explosion in India
the recent explosion of interest in Latin music and dance
a sudden expression of emotion, especially anger [= outburst]
a sudden very loud noise
an explosion of laughter