Source : Webster's Revised Unabridged Dictionary (1913)

Newborn \New"born`\, a.
   Recently born. --Shak.

Source : WordNet®

newborn
     adj 1: recently borne; "a newborn infant"
     2: having just or recently arisen or come into existence; "new
        nations"; "with newborn fears" [syn: {newly arisen}, {new-sprung(a)}]

newborn
     n : a baby from birth to four weeks [syn: {neonate}, {newborn
         infant}, {newborn baby}]