Definitions of explosion:

• noun:   the act of exploding or bursting something

  Example: "The explosion of the firecrackers awoke the children"

• noun:   a golf shot from a bunker that typically moves sand as well as the golf ball
• noun:   a sudden outburst

  Example: "An explosion of laughter"

• noun:   a violent release of energy caused by a chemical or nuclear reaction
• noun:   the noise caused by an explosion

  Example: "The explosion was heard a mile away"

• noun:   a sudden great increase

  Example: "The population explosion"

• noun:   the terminal forced release of pressure built up during the occlusive phase of a stop consonant