1. A large cave.
2. A large underground chamber, as in a cave.
tr.v. cav·erned, cav·ern·ing, cav·erns
1. To enclose in or as if in a cavern.
2. To hollow out.
[Middle English caverne, from Old French, from Latin caverna, from cavus, hollow; see keuə- in the Appendix of Indo-European roots.]
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