light up meaning and definition

LIGHT UP verb

Definition of light up (verb)

1. start to burn with a bright flame
   • "The coal in the BBQ grill finally lit up"
2. make lighter or brighter
   • "This lamp lightens the room a bit"
   • synonyms: illume, illuminate, illumine, light
3. become clear
   • "The sky cleared after the storm"
   • synonyms: brighten, clear, clear up
   • antonym: cloud
4. ignite
   • "The sky lit up quickly above the raging volcano"
5. begin to smoke
   • "After the meal, some of the diners lit up"
   • synonyms: fire up, light