Source : Webster's Revised Unabridged Dictionary (1913)

Abed \A*bed"\, adv. [Pref. a- in, on + bed.]
   1. In bed, or on the bed.

            Not to be abed after midnight.        --Shak.

   2. To childbed (in the phrase ``brought abed,'' that is,
      delivered of a child). --Shak.

Source : WordNet®

abed
     adv : in bed