: 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
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.
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Photo : Modern Angles for Sotheby's International Realty Inside the library with oak paneling.—Demetrius Simms, Robb Report, 30 July 2025 It is also used to treat skin eruptions resembling poison ivy/oak rash.—Anna Giorgi, Verywell Health, 29 July 2025 Nearby is the kitchen, which is split into two, with oak units on each side wall, and includes an induction cooktop, a fridge, sink, cabinetry, and space for more appliances.—Adam Williams
july 27, New Atlas, 27 July 2025 Larvae of the Colorado Hairstreak, our state butterfly, survive solely on Gambel oak leaves.—Special To The Denver Post, Denver Post, 27 July 2025 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
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