noun
(uncountable) Widely cultivated cereal grass, typically Avena sativa.
(countable) Any of the numerous species, varieties, or cultivars of any of several similar grain plants in genus Avena.
(usually as plural) The seeds of the oat, a grain, harvested as a food crop and for animal feed.
A simple musical pipe made of oat-straw.
The tiniest amount; a whit or jot.
preposition phrase
Alternative letter-case form of OAT.