[AFTER- 6.] A glow or refulgence that remains after the disappearance of any light, esp. that which lights the western sky after sunset; also fig.
1873. L. Tollemache, in Fortn. Rev., Feb., 228. [The belief] has left an after-glow of sentiment about the sacredness of life.
1877. Miss A. B. Edwards, 1000 m. up Nile, xi. 296. The sun had set, the after-glow had faded, the twilight was closing in.
1881. A. J. C. Hare, Lucca, i. in Gd. Wds., XXII. 24. The peaks stand out black and solemn against the infinite radiance of the afterglow.