Emily Dickinson Lexicon

cavern (-s, -'s), n. [Fr. < L. caverna, cave, den, cavity; see cave, n.] (webplay: chasm, dark, place).

1. Large cave; deep dark subterranean space; place under the ground.
2. Grotto; [fig.] void; vacancy; emptiness; hidden dimension; unseen time periods and empty spaces.