Definitions for "Grave liner"
This is also known as an "outer container". A grave liner is a concrete container which is placed in a grave for the purpose of holding the casket. Using a grave liner ensures the grave will not settle or "sink" over time. The Catholic Cemeteries manufactures and sells concrete grave liners that can be purchased at the time a lot is selected.
An outer burial container used to house a casket. It is made of concrete with minimal steel reinforcements and has no seal.
a concrete container within a grave site in which the casket is placed