English Dictionary

English-English :

1. Learner’s Dictionary

Babylon: http://www.manythings.org/daily/
Cambridge: http://dictionary.cambridge.org/
Collins: http://www.collins.co.uk/wordexchange/
Encarta: http://encarta.msn.com/encnet/features/dictionary/dictionaryhome.aspx
Longman: http://pewebdic2.cw.idm.fr/
Newbury House: http://nhd.heinle.com/activities.aspx
Oxford: http://www.oup.com/elt/catalogue/teachersites/oald7/lookup?cc=th
WordCentral: http://www.wordcentral.com/index.html
Wordweb: http://www.wordwebonline.com/

2. Advance’s Dictionary

American Heritage: http://education.yahoo.com/reference/dictionary/
http://www.english-dictionary.us/
http://www.hyperdic.net/doc/wordnet.htm
http://www.thefreedictionary.com/
http://www.webster-dictionary.net/
Merriam-Webster: http://www.m-w.com/

English-Thai:

http://www.siamdic.com/search.php
http://www.thai-language.com/dict/

English-Thai: Thai-English

http://lexitron.nectec.or.th/index1.php
http://www.cyberdict.com/
http://www.ethaimusic.com/dictionary/index.html
http://www.pixiart.com/dict/

Thesaurus

http://thesaurus.reference.com/
http://www.bartleby.com/62/
http://www.m-w.com/thesaurus.htm

Phrasal Verb Dictionary:

Cambridge International Dictionary of Phrasal Verbs: http://dictionary.cambridge.org/default.asp?dict=P
http://www.englishpage.com/prepositions/phrasaldictionary.html

Collocation Dictionary:

http://sara.natcorp.ox.ac.uk/lookup.html
http://www.edict.com.hk/concordance/WWWAssocWords.htm
http://www.lextutor.ca/concordancers/concord_e.html
http://www.natcorp.ox.ac.uk/

Techincal Dictionary

http://www.alarice.com/dictionariesonline.htm
http://www.alphaplus.ca/opnhs/english/SiteList.asp?IndNm=72
http://www.glossarist.com/gsearch.asp
http://www.leidenuniv.nl/ub/biv/specials.htm
http://www.lib.utk.edu/refs/diction.htm
http://www.library.usyd.edu.au/subjects/readyref/dictionaries.html
http://www.onelook.com/?d=all_gen&v=l&sort=&langdf=all
http://www.specialist-online-dictionary.com/dictionary/
http://www.thefreedictionary.com/
http://www.uwasa.fi/comm/termino/collect/
http://www.yourdictionary.com/specialty.html

Technical Dicitionary (English -Thai)
Astro: http://thaiastro.nectec.or.th/ency/
Thai dict : http://rirs3.royin.go.th/riThdict/lookup.html
IT: http://www.widebase.net/itterm/termindex_0.htm
Physics: http://www.rit.ac.th/homepagesc/charud/dictionary/dicphysics/pic1/index.htm Iirrigation: http://203.155.16.66/apitarn.htm
Engineering Dictionary: http://www.tumcivil.com/dic/
Environment Dict: http://www.deqp.go.th/info/info-3.jsp?languageID=th
http://rirs3.royin.go.th/coinages/webcoinage.php
http://www.royin.go.th/th/home/index.php

Acronym, abbreviation, or initialism stands
http://slang.acronymfinder.com/
http://www.stands4.com/

Talking Dictionary
http://encarta.msn.com/encnet/features/dictionary/dictionaryhome.aspx
http://www.allwords.com/
http://www.m-w.com/
http://www.yourdictionary.com/
http://www.howjsay.com/

Multi Lingaul Dictionary Online:

http://babelfish.altavista.com/
http://translation2.paralink.com/
http://www.arts.chula.ac.th/~ling/mdict/
http://www.google.com/language_tools?hl=en
http://www.systransoft.com/

Picture's Dictionary
http://english-zone.com/vocab/birds/birdies.html
http://home.earthlink.net/~wflint/GPD/AutomaticPictureDictionary.html
http://iteslj.org/v/ei/
http://simple.wikipedia.org/wiki/Basic_English_picture_wordlist
http://web2.uvcs.uvic.ca/elc/studyzone/200/vocab/index.htm
http://www.bartleby.com/61/indexillus.html
http://www.enchantedlearning.com/DictionaryA.html
http://www.factmonster.com/dictionary.html
http://www.freesearch.co.uk/pictures
http://www.languageguide.org/english/
http://www.manythings.org/vq/
http://www.oulu.net/koulut/pollonkangas/aa/picture_dictionary/aakkoset.htm
http://www.pdictionary.com/
http://www.picsearch.com/
http://www.text-reader.com/picdic/index.shtml
http://www.thaigoodview.com/library/teachershow/bangkok/chaicharn/
http://www.washjeff.edu/capl/
http://www.wordcentral.com/aol/index.html
http://www.yindii.com/kids/dictionary/index.htm

Search
http://www.google.com/imghp?hl=en&tab=wi&q=
http://images.search.yahoo.com/search/images
http://www.altavista.com/image/default
http://lookwayup.com/free/dictionary.htm
http://www.dictionarylink.com/
http://www.elckiev.org/dictionary/dictionary_en.php
http://www.onelook.com
http://www.online-dictionary.net/english/index.php
http://www.sultan.org/enc/
http://www.wphat.com/research/dictionary/searchdict.htm
http://www.yourdictionary.com/languages/germanic.html#english

Download Dictionary's software
http://lexitron.nectec.or.th/downloadLex_detail.html
http://www.wordweb.co.uk/free/