■ noun
1》 a large tree which bears acorns and typically has lobed leaves and hard durable wood. [Genus Quercus : many species.]
↘used in names of other trees or plants resembling this, e.g. poison ~ .
2》 a smoky flavour or nose characteristic of wine aged in ~ barrels.
Phrases
sport the (or one's ) ~ Brit. (in certain universities) shut the outer door of one's room as a sign that one does not wish to be disturbed. [such doors were often formerly made of ~.]
Derivatives
~en adjective ( archaic ).
~y adjective
Origin
OE āc , of Gmc origin.