Proofreader (noun)

1. A person who reads over printed or written material and checks for errors.
2. A professional who reads over written material to find and correct errors in grammar, punctuation, spelling, and formatting before it gets printed or published.

Origin:

From proof + reader.

Examples:

1. The proofreader caught several spelling errors in the manuscript.
2. The proofreader went over the document with a fine-toothed comb, catching all the typos.
3. The book had been proofread several times, but still had several errors.
4. The proofreader's job is to ensure that the final copy is error-free before it goes to print.
5. Proofreading is a crucial step in the publishing process, as it ensures that the final product is of high quality.