From The Collaborative International Dictionary of English v.0.48 :
Inter \In*ter"\, v. t. [imp. & p. p. Interred; p. pr. & vb. n.
Interring.] [OE. enteren, OF. enterer, enterrer, LL.
interrare; L. pref. in- in + terra the earth. See Terrace.]
To deposit and cover in the earth; to bury; to inhume; as, to
inter a dead body. --Shak.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
interred
adj 1: placed in a grave; "the hastily buried corpses" [syn:
buried, inhumed, interred] [ant: unburied]