1. Covered over, shaded, or darkened; destitute of light; imperfectly illuminated; dusky; dim. His lamp shall be put out in obscure darkness. (Prov. Xx. 20)
2. Of or pertaining to darkness or night; inconspicuous to the sight; indistinctly seen; hidden; retired; remote from observation; unnoticed. The obscure bird Clamored the livelong night. (Shak) The obscure corners of the earth. (Sir J. Davies)
3. Not noticeable; humble; mean. O base and obscure vulgar. . An obscure person.
4. Not easily understood; not clear or legible; abstruse or blind; as, an obscure passage or inscription.
5. Not clear, full, or distinct; clouded; imperfect; as, an obscure view of remote objects.
(Science: optics) Obscure rays, those rays which are not luminous or visible, and which in the spectrum are beyond the limits of the visible portion.
Synonym: Dark, dim, darksome, dusky, shadowy, misty, abstruse, intricate, difficult, mysterious, retired, unnoticed, unknown, humble, mean, indistinct.
Origin: L. Obscurus, orig, covered; ob- (see Ob-) – a root probably meaning, to cover; cf. L. Scutum shield, Skr. Sku to cover: cf.F. Obscur. Cf.Sky.