Specially designed to meet the needs of ESL students, this Dictionary is a necessity for anyone seeking to learn and use American English effectively. Its many distinctive features include: Clear and precise definitions adapted from the acclaimed American Heritages Dictionary; Extensive vocabulary, fully up-to-date for the 21st century; Abundant idioms and example sentences; Word Building Notes and Usage Notes with expanded information on vocabulary; More comprehensive grammar information than any comparable dictionary; A wealth of informative photographs and illustrations; and New Reference and Study Guide offering convenient help with basic English grammar, style, and much more.