noun, often attributive \ˈōk\

: a type of tree that grows in northern parts of the world and that produces acorns

: the wood of an oak tree

plural oaks or oak

Full Definition of OAK

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
:  the leaves of an oak used as decoration
oak·en \ˈō-kən\ adjective

Illustration of OAK

Origin of OAK

Middle English ook, from Old English āc; akin to Old High German eih oak and perhaps to Greek aigilōps, a kind of oak
First Known Use: before 12th century
OAK Defined for Kids


noun \ˈōk\

Definition of OAK for Kids

:  a tree or shrub that produces acorns and has tough wood much used for furniture and flooring
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