1. The act of wavering or of fluttering; flucuation; sudden and brief increase of brightness; as, the last flicker of the dying flame.
2. (Science: zoology) The golden-winged woodpecker (Colaptes aurutus); so called from its spring note. Called also yellow-hammer, high-holder, pigeon woodpecker, and yucca. The cackle of the flicker among the oaks. (Thoureau)