Pitch-black, intensely dark; (of darkness) intense, thick.

Of or belonging to the legendary Cimmerii. Hence, proverbially used as a qualification of dense darkness, gloom, or night, or of things or persons…

(a) adj. intensely dark, esp. from lack of light; (b) n. intense dark.

As dark as a pit; intensely dark, pitch dark.

= pitch dark adj. n.

In phrases child,or man, of sin; as black,or ugly, as sin. Also like (or worse than) sin: vehemently, intensely, vigorously. Cf. like the devil at…