The 15 biggest Oxford dictionaries at your fingertips Powered by Oxford Languages, Oxford Dictionary is widely regarded as one of the highest authorities in the study and reference of languages today. Easily switch and navigate between the 15 biggest Oxford dictionaries along with advanced search and learning tools. · Oxford Dictionary of English & Thesaurus · New Oxford American Dictionary & Thesaurus · Oxford Hachette French Dictionary · Oxford German Dictionary · Oxford Spanish Diction