pitch black

WordReference Random House Learner's Dictionary of American English © 2025

ˈpitch-ˈblack,  adj. 

1. extremely black or dark, as pitch:
   a pitch-black night with no moon.

WordReference Random House Unabridged Dictionary of American English © 2025

pitch-black  (pich′blak′), adj. 

1. extremely black or dark as pitch:
   a pitch-black night.

• 1590–1600

Collins Concise English Dictionary © HarperCollins Publishers::

pitch-black adjective

1. extremely dark; unlit: the room was pitch-black
2. of a deep black colour