(a.) Partaking of the qualities of pitch; resembling pitch.
(a.) Smeared with pitch.
(a.) Black; pitch-dark; dismal.
Example Sentences:
(1) The air reeked of pine resin and the pitchy vinegar of wood ants.
(2) I hadn't learned how to tune a guitar, and nor had I really learned how to sing yet – so there are moments where it gets a bit "pitchy", to use modern parlance.