only 1 use
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Definitiona smaller room attached to a larger room — typically used as a reception/waiting room
- "This is merely the antechamber, the entrance hall," said Dumbledore after a moment or two.Chapter 26 -- The Cave (12% in)
There are no more uses of "antechamber" in Harry Potter (#6) and the Half-Blood Prince.
Typical Usage (best examples)