Source : WordNet®

at rest
     adj 1: in a state of repose or especially sleep [syn: {at rest(a)}]
     2: dead; "he is deceased"; "our dear departed friend" [syn: {asleep(p)},
         {at peace(p)}, {at rest(p)}, {deceased}, {departed}, {gone}]
     adv : in a relaxed position, of soldiers; "the soldiers were
           standing at ease" [syn: {at ease}]