- any of several American oaks, especially Quercus stellata, the wood of which is used for posts.
Origin of post oak
An Americanism dating back to 1755–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for post oak
The post-oak most resembles the English oak in growth, leaf, &c.
A seedling of Post-oak crossed with Herbemont; from Munson; introduced in 1896.
A seedling of a wild Post-oak crossed with Triumph; from Munson, introduced in 1893.
A seedling of Post-oak crossed with Herbemont; from Munson in 1885.
A cross between Munson of America and a Post-oak hybrid, about 1898.