(n): (physics) electromagnetic radiation that can produce a visual sensation
(n): a rapid change in brightness; a brief spark or flash
(n): an event that occurs when something passes from one state or phase to another
(n): a brilliant display of wit
(n): unusual mental ability
(n): the quality of shining with a bright reflected light
(n): the location of a visual perception along a continuum from black to white
(n): the twinkling of the stars caused when changes in the density of the earth's atmosphere produce uneven refraction of starlight
(n): the quality of being unsteady and subject to changes
