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Webster 1913 Edition

Adj.

[From 1st

Partaking of the qualities of pitch; resembling pitch.

Smeared with pitch.

Black; pitch-dark; dismal.

“Pitchy night.”

Shak.

Adj.

Partaking of the qualities of pitch; like pitch.

Smeared with pitch.

Black; dark; dismal; as the pitchy mantle of night.

pitchy ‎(comparative pitchier, superlative pitchiest)

Of, pertaining to, or resembling pitch.
Very dark black; pitch-black.
- 1843, Thomas Carlyle, Past and Present, book 2, ch. 5, Twelfth Century
  Mancunium, Manceaster, what we now call Manchester, spins no cotton […] The Creek of the Mersey gurgles, twice in the four-and-twenty hours, with eddying brine, clangorous with sea-fowl; and is a Lither-Pool, a lazy or sullen Pool, no monstrous pitchy City, and Seahaven of the world!
(music) Off pitch; out of tune.