especially: a widely cultivated cereal grass (A. sativa)
b
: a crop or plot of the oat
also: the seed of an oat —usually used in plural but singular or plural in construction
2
archaic: a reed instrument made of an oat straw
Illustration of oat
oat 1a
Phrases
feel one's oats
: to act in a newly self-confident and often self-important manner
Examples of oat in a Sentence
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The antioxidant-rich super food can be used in smoothies, muffins, pancakes, overnight oats or even enjoyed all on their own.—Toria Sheffield, People.com, 7 June 2025 The cafe will serve breakfast options too, like avocado toast on artisan bread and overnight oats.—Karen Billing, San Diego Union-Tribune, 23 May 2025 Its formula is gentle and fragrance free and is infused with oat, calendula, and shea butter to cleanse and nourish even the most sensitive skin.—Laura Lu, Parents, 22 May 2025 Oat Bread Oat bread is bread made from oats, which are a good source of fiber, including a type of soluble fiber called beta-glucan.—Jillian Kubala, Health, 20 May 2025 See All Example Sentences for oat
Word History
Etymology
Middle English ote "the grain of the oat plant, the plant itself," going back to Old English āte (weak feminine noun), of uncertain origin
Note:
Old English āte has been compared with regional Dutch aate, oote "wild oats" (West and Zeeland Flanders), West Frisian and Groningen Dutch oat. (These contrast with Dutch haver, denoting cultivated oats, a reflex of the Common Germanic word for the grain.) Michiel de Vaan, in an addenda to the online etymologiebank.nl, believes that the Flanders words are semantic extensions of regional aat "food," of general Germanic origin (see eat entry 2), though this hypothesis would scarcely explain the Old English word. Jan de Vries (Nederlands Etymologisch Woordenboek, Brill, 1971) hypothesizes that the Low Country words may have been borrowed from English.
First Known Use
before the 12th century, in the meaning defined at sense 1a
Time Traveler
The first known use of oat was
before the 12th century
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