'Jet-black' definitions:

Definition of 'jet-black'

From: WordNet
adjective
Of the blackest black; similar to the color of jet or coal [syn: coal-black, jet, jet-black, pitchy, sooty]

Definition of 'Jet-black'

From: GCIDE
  • Jet-black \Jet"-black`\, a. Black as jet; deep black. See first jet. [1913 Webster]