Dictionary

acorn

noun \ˈā-ˌkrn, -kərn\

: the nut of the oak tree

Full Definition of ACORN

:  the nut of the oak usually seated in or surrounded by a hard woody cupule of indurated bracts
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Illustration of ACORN

Origin of ACORN

Middle English akern, from Old English æcern; akin to Middle High German ackeran acorns collectively, Old Irish áirne sloe, Lithuanian uoga berry
First Known Use: before 12th century
ACORN Defined for Kids

acorn

noun \ˈā-ˌkrn, -kərn\

Definition of ACORN for Kids

:  the nut of the oak tree
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