A large cave. / An underground chamber. / A large, dark place or space.

(transitive) To form a cavern or deep depression in. / (transitive) To put into a cavern.

Resembling a cavern in size, shape, or atmosphere. / Giving the impression of vast, dark depths.

In a cavernous manner; like a cavern. / In a cavernous manner; sounding deep, hollow, or echoey.

plural of cavern

(poetic) Pitted or hollowed out with caverns. / Living in a cavern.

(pathology) inflammation of the corpus cavernosum

present participle of cavern

Enough to fill a cavern.

plural of cavernful