Dictionary definition · twinkle
noun
- a rapid change in brightness; a brief spark or flash
- merriment expressed by a brightness or gleam or animation of countenance"he had a sparkle in his eye"
verb
- gleam or glow intermittently"The lights were flashing"
- emit or reflect light in a flickering manner"Does a constellation twinkle more brightly than a single star?"
Source: Open English WordNet (CC BY 4.0).