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1[countable, uncountable] (also oak tree) a large tree that produces small nuts calledacorn. Oaks are common in northern countries and can live to be hundreds of years old a gnarled old oak tree forests of oak and pine see poison oak
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- 2[uncountable] the hard wood of the oak tree oak beams This table is made of solid oak. Idioms
something large and successful often begins in a very small way
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