2 uses
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Definition
find out, learn, or determine with certainty (usually by making an effort)
- Arbuthnot's name, age, home address and exact military standing were all ascertained.2.8 — Part 2 Chapter 8 — The Evidence of Colonel Arbuthnot (5% in)
- And as regards the question of left-handedness, ought we not to take steps to ascertain which of the passengers is left-handed?3.2 — Part 3 Chapter 2 — Ten Questions (69% in)
There are no more uses of "ascertain" in Murder On The Orient Express.
Typical Usage
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