1. the nut of an oak tree, typically oval and having a cap

Examples

• The squirrel buried an acorn in the yard.
• Children collected acorns that had fallen from the oak tree.
• An acorn can grow into a mighty oak tree.
• The forest floor was covered with acorns in autumn.
• She found a perfect acorn with its cap still attached.
• The acorn’s cap protects the seed inside.