[countable, usually plural] the part of a place that is furthest from the light and hard to see or get to He stared into the dark recesses of the room. (figurative) The doubt was still there, in the deep recesses of her mind. The statue was in the inner recesses of the temple. I had continually pushed my doubts to the darker recesses of my mind.

the inner hidden parts of something the deep recesses of the cave fears hidden away in the darker recesses of her mind → recess Examples from the Corpus the recesses of something • the dark recesses of the basement • He had tried to sleep, but the horrific apparitions surfaced out of the recesses of his unconscious and frightened him.