Source : Webster's Revised Unabridged Dictionary (1913)

Oatmeal \Oat"meal`\, n.
   1. Meal made of oats. --Gay.

   2. (Bot.) A plant of the genus {Panicum}; panic grass.

Source : WordNet®

oatmeal
     n 1: porridge made of rolled oats [syn: {burgoo}]
     2: meal made from rolled or ground oats [syn: {rolled oats}]