(1):

(n.) A faint, unsteady light; feeble, scattered rays of light; also, a gleam.

(2):

(v. i.) To give feeble or scattered rays of light; to shine faintly; to show a faint, unsteady light; as, the glimmering dawn; a glimmering lamp.

(3):

(n.) Mica. See Mica.