n.
Pronunciation: ' rer- ə - ˌ däs also ' rir- ə - ˌ däs or ' rir- ˌ däs
Function: noun
Etymology: Middle English, from Anglo-French reredors, areredos, from arere behind + dos back, from Latin dorsum ― more at ARREAR
Date: 14th century
: a usually ornamental wood or stone screen or partition wall behind an altar
reredos