* Verb: It describes the action of flashing or wavering light, like in "The candle flame was flickering."
* Adjective: It describes something that is flashing or wavering, like in "The flickering lights cast eerie shadows."
It's important to note that there is no noun form of "flickering." You might use a noun like "flicker" to refer to the act of flickering, or "flash" or "wavering" to describe the specific way something flickers.