Dictionaries and encyclopedias

Britannica Academic
Well-reputed and comprehensive encyclopaedia. Also includes searches in Merriam-Webster Dictionary & Thesaurus.

English Matters
Internet portal from NTNU for people using English in the workplace.

Merriam Webster Online
Large American dictionary. Also integrated into Encyclopaedia Britannica Online.

Ordnett
Search the dictionaries and language resources of the Kunnskapsforlaget.

Oxford English Dictionary
The most comprehensive and up-to-date dictionary for the English language. Shows the origin, history and use of over 600,000 words through 3 million citations from a wide selection of sources. Also includes timelines and historical thesaurus.