Twi"light` (?), n. [OE. twilight, AS. twi- (see Twice) + leoht light; hence the sense of doubtful or half light; cf. LG. twelecht, G. zwielicht. See Light.]
1.
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.
2.
faint light; a dubious or uncertain medium through which anything is viewed.
As when the sun . . . from behind the moon,
In dim eclipse. disastrous twilight sheds.
Milton.
The twilight of probability.
Locke.
© Webster 1913.
Twi"light`, a.
1.
Seen or done by twilight.
Milton.
2.
Imperfectly illuminated; shaded; obscure.
O'er the twilight groves and dusky caves.
Pope.
© Webster 1913.