Oak (noun)

1. A large tree that typically has lobed leaves, acorns, and rugged bark.
2. The wood of an oak tree.

Origin:

Old english āc, of germanic origin; related to dutch eik and german eiche.

Examples:

1. An oak tree can live for hundreds of years.
2. The forest was full of oak trees.
3. The furniture was made of oak.
4. The acorn is the fruit of the oak tree.
5. The oak barrel is used to age wine and whiskey.