- The seeds of a cereal grass, Avena sativa, extensively grown in cool wet climates on poor soils. Once considered a herbal medicine now known to be an excellent source of dietary and soluble fibre. Used extensively in cooking especially as a breakfast cereal and for cakes, biscuits and scones and for coating herring.
- plural noun a cereal food, grown in northern European countries
- acronym foropen-area test site
(written as OATS)