oak Definition
oak
noun
- 1. Any tree or shrub which produces a fruit called an acorn and usually has lobed leaves.
2. The hard durable wood of this tree, widely used in building construction, furniture and flooring, and formerly for shipbuilding.
3. Any of various other trees resembling the oak.
4. A heavy wooden door, especially that of a set of university rooms.
5. The leaves of the oak tree, especially when worn as a wreath or garland.
