The Collaborative International Dictionary of English v.0.48:
Oatmeal \Oat"meal`\, n. 1. Meal made of oats. --Gay. [1913 Webster] 2. (Bot.) A plant of the genus Panicum; panic grass. [1913 Webster]WordNet (r) 3.0 (2006):
oatmeal n 1: porridge made of rolled oats [syn: oatmeal, burgoo] 2: meal made from rolled or ground oats [syn: oatmeal, rolled oats]