often attributive
1
a
: any of several grasses (genus Avena)
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

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

Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Wheat, rice, oat and barley Vegetables: Green beans, potatoes, carrots, beetroots, and radishes Fruits: Bananas and apples These foods are likely to contain higher levels of silicon dioxide. Merve Ceylan, Health, 2 Nov. 2024 The state, which is a major provider of cheese, corn, milk, oats and potatoes, has seen more heat stress on its livestock and crops, according to the USDA. Li Cohen, CBS News, 31 Oct. 2024 Zinc in Whole Grains Whole grains like oats, brown rice, 100% whole wheat bread, quinoa, and barley contain some zinc. Jamie Johnson, Verywell Health, 30 Oct. 2024 They are simply halved and cored, which creates a handy and tasty vessel for the oat and walnut streusel topping mounded in their centers. Lynda Balslev, The Mercury News, 28 Oct. 2024 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

Dictionary Entries Near oat

Cite this Entry

“Oat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oat. Accessed 14 Nov. 2024.

Kids Definition

oat

noun
: a grain that is widely grown for its long loose clusters of seeds which are used for human food and for livestock feed
oaten
ˈōt-ᵊn
adjective

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