firework

US /ˈfaɪr.wɝːk/
UK /ˈfaɪr.wɝːk/
"firework" picture
1.

a device containing gunpowder and other combustible chemicals, which is ignited to produce a display of light, noise, and smoke

:
The sky lit up with colorful fireworks.
They set off fireworks to celebrate the New Year.