Definitions
1.nounA deciduous tree with distinctive deeply lobed leaves, acorns, and notably strong wood, typically of England and northeastern North America, included in genus Quercus.
2.nounThe wood of the oak.
3.nounA rich brown colour, like that of oak wood.
4.nounAny tree of the genus Quercus, in family Fagaceae.
5.nounAny tree of other genera and species of trees resembling typical oaks of genus Quercus in some ways.
6.nounThe outer (lockable) door of a set of rooms in a college or similar institution. (Often in the phrase "to sport one's oak").
7.nounThe flavor of oak.