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]

WordNet (r) 3.0 (2006):

interred
    adj 1: placed in a grave; "the hastily buried corpses" [syn:
           buried, inhumed, interred] [ant: unburied]