Definition: The light perceived before the rising, and after the
setting, of the sun, or when the sun is less than 18¡ below the
horizon, occasioned by the illumination of the earth's atmosphere by
the direct rays of the sun and their reflection on the earth.
Definition: faint light; a dubious or uncertain medium through which
anything is viewed.
Definition: Seen or done by twilight.
Definition: Imperfectly illuminated; shaded; obscure.