Definition of "oat" in English

noun

1. (uncountable) Widely cultivated cereal grass, typically Avena sativa.

   • The oat stalks made good straw.
   • The main forms of oat are meal and bran.
   • World trade in oat is increasing.

2. (countable) Any of the numerous species, varieties, or cultivars of any of several similar grain plants in genus Avena.

   • The wild red oat is thought to be the ancestor of modern food oats.

3. (usually as plural) The seeds of the oat, a grain, harvested as a food crop and for animal feed.

4. A simple musical pipe made of oat-straw.

5. The tiniest amount; a whit or jot.

preposition phrase

1. Alternative letter-case form of OAT.