oakless adjective2 •Having no oak trees.Leaves of both Quercus gambeli and its near relative Q. margaretta contributed to the rich Early Pleistocene fossil record of Rita Blanca Lake in west Texas, presently an oakless region. — 2015 •Of wine, not having been aged in an oak barrel.An oakless chardonnay from California or a lower burgundy maconnais white wine. — 2006