This internationally acclaimed dictionary is widely used as a key reference tool by language professionals. With over 300,000 words and phrases, and half a million translations, and packed full of grammatical and usage information for both languages, it is the most authoritative Spanish bilingual dictionary available. Developed through consultation with academic advisors, its editors have used the latest technology to search millions of words of web-based text identifying the most recent additions to Spanish and English, and changes in usage.