'Gruel' definitions:

Definition of 'gruel'

From: WordNet
noun
A thin porridge (usually oatmeal or cornmeal)

Definition of 'Gruel'

From: GCIDE
  • Gruel \Gru"el\, n. [OF. gruel, F. gruau; of German origin; cf. OHG. gruzzi groats, G. gr["u]tze, As. gr[=u]t. See Grout.] A light, liquid food, made by boiling meal of maize, oatmeal, or flour in water or milk; thin porridge. [1913 Webster] grueling