Based on the American Heritage Dictionary, The American Heritage English as a Second Language Dictionary is specifically designed to suit the needs of intermediate to advanced ESL students and prepares them to use standard American dictionaries. The distinctive features of The American Heritage English as a Second Language Dictionary include up-to-date word list based on the American Heritage Dictionary; authoritative definitions adapted from American Heritage Dictionary; easy-to-use alphabetic pronunciation system; abundant sample sentences and phrases; homonyms and synonyms, prefixes and suffixes, and phrasal verbs and idioms, as separate entries; most comprehensive coverage of abbreviations; word building notes and usage notes; most comprehensive grammar information; and abundant photographs and illustrations.