1. (n.) The officer who presides over an assembly to preserve order\, propose questions, regulate the proceedings, and declare the votes.

2. (n.) One who, or that which, moderates, restrains, or pacifies.

3. (n.) In the University of Oxford, an examiner for moderations; at Cambridge, the superintendent of examinations for degrees; at Dublin, either the first (senior) or second (junior) in rank in an examination for the degree of Bachelor of Arts.

4. (n.) A mechanical arrangement for regulating motion in a machine, or producing equality of effect.

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