noun
memorial monument; memorial stone
A physical monument or stone erected to commemorate the dead; often found at gravesites or memorial parks.
公園に戦没者の追悼碑が建てられた。
A memorial monument for the war dead was erected in the park.
記念碑 is a general commemorative monument for events or achievements, not necessarily for the dead.
Compound of 追悼 (mourning, remembrance) and 碑 (stone monument).