The authoritative High School dictionary written for students grades 9-11, ages 14 and up. A great study aid for students building vocabulary as they prepare for college-level reading. Features more than 100,000 definitions and 28,000 usage examples. More than 500 synonym paragraphs, 200 word history paragraphs that clarify meaning, and nearly 1,000 illustrations. Special sections include biographical names, geographical names and signs and symbols. An excellent resource for college test prep.