Adjective at rest has 2 senses
  1. at rest - in a state of repose or especially sleep
    Antonym:
    awake (indirect, via asleep)
  2. asleep, at peace, at rest, deceased, departed, gone - dead; "he is deceased"; "our dear departed friend"
    Antonym: alive (indirect, via dead)
,Adverbial at rest has 1 sense
  1. at ease, at rest - in a relaxed position, of soldiers; "the soldiers were standing at ease"
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