Definition of crypts:
(n) :
An underground vault.
(n) :
Especially: one beneath a church that is used as a burial chamber.
(n) :
(now rare) A cave or cavern.
(n) :
(anatomy) A small pit or cavity in the surface of an organ or other structure.
(n) :
(botany) Any of the genus Cryptocoryne of aquatic plants of southern and southeastern Asia.
(n) :
(botany) Any of the genus Cryptopus of orchids of Madagascar and Mauritius.