cavernous

adjective5

1. •
   Resembling a cavern in size, shape, or atmosphere.

   • At 8:34 p.m. Saturday night, in the cavernous ballroom at the Washington Hilton, I heard a loud crashing noise, like a big tray of dinner plates hitting the floor. — 2026
2. •
   Giving the impression of vast, dark depths.

   • cavernous eyes
3. •
   Having many caverns.
4. •
   Composed largely of vascular sinuses and capable of dilating with blood to bring about the erection of a body part.
5. •
   Having cavities.