剑桥在线辞典 Cambridge Dictionary
Cambridge Dictionary of American English
Cambridge Learner’s Dictionary
Cambridge International Dictionary of Phrasal Verbs
Cambridge International Dictionary of Idioms http://www.cup.cam.ac.uk/elt/dictionary/
Getty Art and Architecture Thesaurus - searchable database and research tool of concepts related to art, architecture, and material culture. Includes styles and periods, agents, built works, materials and techniques, and more. http://shiva.pub.getty.edu/aat_browser/
Getty Thesaurus of Geographic Names - search on place and feature names worldwide. Results identify location contextually, ie what state or province a city is in, and by coordinates. http://shiva.pub.getty.edu/tgn_browser/
Lexical FreeNet - this program allows you to search for rhymes and relationships between words and concepts that might never have occurred to you. http://www.link.cs.cmu.edu/lexfn/
Phrase Finder, The - thesaurus of phrases and sayings in English. Type in a word and it will return a list of related phrases. http://www.shu.ac.uk/web-admin/phrases/
Plumb Design Visual Thesaurus - an exploration of sense relationships within the English language. By clicking on words, you follow a thread of meaning, creating a spatial map of linguistic associations. http://www.plumbdesign.com/thesaurus/
