What does "teak" mean?

Teak: A tree of East Indies (Tectona grandis) which furnishes an extremely strong and durable timber highly valued for shipbuilding and other purposes; also, the timber of the tree. [Written also teek.] African teak, a tree (Oldfieldia Africana) of Sierra Leone; also, its very heavy and durable wood; -- called also African oak. -- New Zeland teak, a large tree (Vitex littoralis) of New Zeland; also, its hard, durable timber.