porridge UK /ˈpɒɹ.ɪd͡ʒ/US /ˈpɔɹɪd͡ʒ/ noun5 •A dish made of grain or legumes, milk or water, heated and stirred until thick and typically eaten for breakfast.Eat your porridge while it's hot! •(UK) Oat porridge; oatmeal. •(Singapore, Malaysia) Rice porridge; congee. •(UK, slang) A prison sentence.Just do your porridge and keep your head down. •(rare) A type of thick soup or stew, especially thickened with barley. formsporridges