dwarf oak dwar·foak uncommon noun 1. deciduous shrubby tree of northeastern and central United States having a sweet edible nut and often forming dense thickets Synonymsdwarf chinkapin oakdwarf chinquapin oakdwarf oakQuercus prinoides Related words Broader terms chestnut oak WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.