Source : Webster's Revised Unabridged Dictionary (1913)

Morn \Morn\, n. [OE. morwen, morgen, AS. morgen; akin to D.
   morgen, OS. morgan, G. morgen, Icel. morginn, morgunn, Sw.
   morgon, Dan. morgen, Goth. ma['u]rgins. Cf. {Morrow},
   {Morning}.]
   The first part of the day; the morning; -- used chiefly in
   poetry.

         From morn To noon he fell, from noon to dewy eve.
                                                  --Milton.

Source : WordNet®

morn
     n : the time period between dawn and noon; "I spent the morning
         running errands" [syn: {morning}, {morning time}, {forenoon}]