Transform your English with Collins COBUILD Advanced Dictionary of American English, English/Japanese. Learn to use English like native speakers, understand words, and improve your pronunciation.

Created especially for Japanese learners of English, this app brings together our best ever COBUILD dictionary with new features only possible on your Apple device. With simple, elegant design and clever features, COBUILD is now easier than ever to use.

• Search for words, example sentences and idioms in English and Japanese
• Simple, clear definitions taken from natural English as it is really used
• Over 105,000 Japanese translations help you understand English naturally
• Full human-voice headword audio in standard American pronunciation
• ”Jump” feature – touch any word anywhere in the dictionary to go to the definition
• Add favorites to create your own vocabulary list and view search history
• Words divided into levels of frequency, helping you choose the important words to study
• Thesaurus feature helps you improve your vocabulary
• Pronunciation feature helps you identify tricky words and learn to pronounce them
• Usage feature helps you choose the right words for the right situation
• Word partnerships highlight helpful word patterns (collocations)
• Word Webs present related vocabulary and information in context to help understanding
• Style labels tell you whether a word is formal, offensive, funny, old-fashioned etc.
• Cultural notes on important events, traditions and customs to help your understanding
• List of tricky irregular verbs to watch out for
• Explanation of grammatical terms, helpful instructions on how to get the very best out of your COBUILD dictionary and much more

Collins COBUILD dictionaries are popular worldwide because:

• Unique definition style uses full, clear and natural English sentences to explain the meaning of words, and also shows typical usage, grammar and style
• Very broad and deep coverage of the modern English language
• Over 56,000 grammar labels help you use the words you discover
• Words and phrases from all English dialects clearly marked (American, British, Australian etc.)
• Created using the first, biggest and best corpus of English in the world

When the very first COBUILD dictionary was published, it changed dictionaries forever. Based on The Collins Corpus - the largest collection of English data in the world with over 5 billion words - Collins editors use the corpus to analyze the way people really use English today.