The Oxford English Dictionary is the accepted authority on the English language across the English-speaking world. It offers authoritative definitions, as well as etymological analyses, variant spellings, and pronunciations.
Britannica Academic Edition contains the Encyclopaedia Britannica, one of the largest, most authoritative encyclopedias in the world. Besides articles it includes ebooks, links to major news stories from the New York Times and the BBC, maps, photos, and other multi-media tools such as interactive timelines and videos. It also has Merriam-Webster’s Collegiate Dictionary and Thesaurus, and the Britannica Student Encyclopedia.