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Meaning of rater

rat•er

Pronunciation: (rā'tur), [key]
— n.
  1. a person who makes rates or ratings.
  2. a person or thing that is of a specific rating (usually used in combination): The show's star is a first-rater.
  3. any of various small, popular yachts belonging to standard classes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.