n 1: a momentary flash of light [syn: spark, glint]
2: North American woodpecker
3: the act of moving back and forth [syn: waver, flutter]
v 1: move back and forth very rapidly, as of a candle [syn: waver, flitter, flutter, quiver]
2: shine unsteadily; "The candle flickered" [syn: flick]
3: flash intermittently; "The lights flicked on and off" [syn: flick]