oak

noun12

1. •
   a large tree that grows acorns and has very hard strong wood
2. •
   Any member of species of the genus Quercus, in family Fagaceae.
3. •
   The wood of the oak.
4. •
   The flavor of oak.
5. •
   A rich brown color, like that of oak wood.
6. •
   Any member of other species of trees resembling typical oaks of genus Quercus in some ways.
7. •
   she-oaks in Allocasuarina and Casuarina, of family Casuarinaceae
8. •
   white oaks Lagunaria, in family Malvaceae
9. •
   silky oaks, in family Proteaceae
10. •
    poison oak Toxicodendron, in family Anacardiaceae
11. •
    tanbark oaks or stone oaks, of species of genera Lithocarpus and Notholithocarpus in family Fagaceae.
12. •
    The outer (lockable) door of a set of rooms in a college or similar institution. (Often in the phrase sport one's oak.)

    • [E]very set of rooms has two doors, and I soon learned that the outer door, which is thick and solid, is called the oak, and to shut it is termed, to sport. — 1833

adjective2

1. •
   Made of oak wood or timber.

   • an oak table, oak beam, etc.
2. •
   Having a rich brown color, like that of oak wood.

verb1

1. •
   To expose to oak in order for the oak to impart its flavors.

prepositional phrase1

1. •
   Initialism of of a kind.

   • In poker, 3 OAK beats two pair.