Initialism of of a kind.

Of a wine: aged in oak so that it acquires flavor from tannins in the wood.

(wine, transitive) To expose to oak in order for the oak to impart its flavors.

having a rich brown colour, like that of oak wood. / made of oak wood or timber

(countable) A deciduous tree with distinctive deeply lobed leaves, acorns, and notably strong wood, typically of England and northeastern North America, included in genus Quercus.

plural of oak

(horse racing) A stakes race in which entry is restricted to 3-year-old fillies.

The quality of being oak, or of being an oak tree.

A suburban area of Huddersfield, West Yorkshire, England (OS grid ref SE112341). / A city in Dickey County, North Dakota, United States. / A surname.

plural of chestnut oak