plural oaks or oak
often attributive
1
a
: any of a genus (Quercus) of trees or shrubs of the beech family that produce acorns
also : any of various plants related to or resembling the oaks
b
: the tough hard durable wood of an oak tree
2
: the leaves of an oak used as decoration

Illustration of oak

Illustration of oak
  • 1 acorn
  • 2 leaf

Examples of oak in a Sentence

Tall oaks line the street. The table is solid oak. The cabinets are made of oak.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In an adjacent room is a lounge space with emerald panels, oak bookshelves and velvet couches. Paige Reddinger, Robb Report, 3 Apr. 2026 The tom answered his yelps a few times, and Bill sat down in a screen of bushes with his back to a broad oak and his gun ready. Charles Elliott, Outdoor Life, 2 Apr. 2026 Two elegant lounges around the main reception hold deep velvet sofas, and the décor is all original or recreated oak panelling, intricate cornicing, 19th century fireplaces and granite flagstones. Condé Nast, Condé Nast Traveler, 1 Apr. 2026 With this in mind, researchers led by Yu Fukasawa at Tohoku University in Sendai attached electrodes to 37 ectomycorrhizal mushrooms growing on the floor of an oak forest. Andrew Paul, Popular Science, 1 Apr. 2026 See All Example Sentences for oak

Word History

Etymology

Middle English ook, oke, going back to Old English āc, going back to Germanic *eik- (whence also Old Frisian ēk "oak," Old Saxon ēc, Old High German eih, eihha, Old Norse eik), of obscure origin

Note: Old English āc is a feminine root noun (dative singular and nominative plural ǣc), though forms leveled to other declensions with umlaut are already evident. Germanic *eik- has been compared with the Greek words aigílōps, a name in Theophrastus for a species of oak (Quercus macrolepis?), and krátaigos, a species of hawthorn (also in Theophrastus), but interpretation of the conjoined elements of these words is conjectural (lṓpē is not actually attested in the sense "cork" or "bark"). The derivation of Latin aesculus "a species of oak (Quercus petraea?)" is obscure. The Lithuanian dialect forms áižuols and áužuolas "oak," superficially comparable, are hypercorrections of ą́žuolas, which is very unlikely to be related to *eik- (cf. Old Prussian ansonis = German eche in the Elbing Vocabulary).

First Known Use

before the 12th century, in the meaning defined at sense 1a

Time Traveler
The first known use of oak was before the 12th century

Browse Nearby Words

Cite this Entry

“Oak.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oak. Accessed 5 Apr. 2026.

Kids Definition

oak

noun
plural oaks or oak
1
: any of various trees or shrubs closely related to the beeches and chestnuts and producing acorns
2
: the tough hard wood of the oak much used for furniture and flooring
oaken adjective

More from Merriam-Webster on oak

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster