Dictionaries

Monolingual, English

Merriam-Webster Online

Cambridge Dictionaries Online

Oxford Reference Online

The American Heritage® Dictionary of the English Language

The Newbury House Online Dictionary

OneLook Dictionary Search

Encarta dictionary

Dictionary.com

yourdictionary.com

RhymeZone - rhymes, synonyms, definitions

UsingEnglish.com - Dictionary of English Idioms & Idiomatic Expressions

Multilingual, including English

Eurodicautom

Terminology Collection Online Dictionaries

WordNet - a Lexical Database for English

Freedict.com - bilingual dictionaries

Travlang's Translating Dictionaries

The WorldWideWeb Acronym and Abbreviation Server

Milterm - norsk-engelsk miljøterminologi

European Environment Agency multilingual environmental glossary

FishBase

yourdictionary.com

List of Multilingual Dictionaries

Yahoo Dictionary Index

Monolingual, Norwegian

Bokmålsordboka og Nynorskordboka