a device containing gunpowder and other combustible chemicals which causes spectacular effects and explosions when ignited, used for display or in celebrations:they were oohing and aahing as if they were watching the fireworks [as modifier]:a firework display
(fireworks) an outburst of anger, or a display of great skill or energy:when you put these men together you’re bound to get fireworks
firework in other Oxford dictionaries
Definition of firework in the US English dictionary
