Definition: Meaning of, Birnam Wood in English to English dictionary.
Pronunciation:/ wʊd /
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the wood near Birnam in Perthshire, Scotland. In Shakespeare's play 'Macbeth', Macbeth is told that he will only be defeated when Birnam Wood comes to Dunsinane. Later, his enemy's army comes through Birnam Wood and each soldier cuts a large branch to hide himself, so that when the army moves on it looks as if the wood is moving. Macbeth is defeated and killed.