English Dictionaries

• Merriam-Webster (provides meanings, parts of speech, pronunciations and synonyms)
  
  • http://www.webster.com
• Cambridge (recommended for higher form studemts, you may look up meanings and sample sentences of phrasal verbs and idioms)
  
  • http://dictionary.cambridge.org

English - Chinese Dictionaries

• DictionaryHK.com (provides Chinese meanings)
  
  • http://www.dictionaryhk.com
• Tigernt.com (provides Chinese meanings)
  (含漢英字典、英漢字典、TOEFL及 GRE 考試詞彙、及網上工具連結)
  
  • http://www.tigernt.com/dict.shtml

Chinese - English Dictionaries

• Chinese - English Dictionary of Modern Usage (provides meanings and parts of speech)
  林語堂當代漢英詞典 (備有漢字部首索引和漢語拼音檢索功能)
  
  • http://humanum.arts.cuhk.edu.hk/Lexis/Lindic

Encyclopedia

• Encyclopedia.com (use this to get information for your research paper or assignment)
  
  • http://www.encyclopedia.com

• Translate text between different languages (use this to translate a paragraph or a webpage, but please be careful, it may not be accurate!)
  
  • http://www.translation-guide.com/free_online_translations.htm

Others

• 金山詞霸
  漢英、英漢詞典，備有短句查詢
  
  • http://cb.kingsoft.com
• Glossaries of Terms Commonly Used in the teaching of Science Subjects
  中學科學科目常用英漢辭彙﹝科學、化學、生物及物理科英漢/漢英辭彙搜尋﹞
  
  • http://cd.ed.gov.hk/sci/glossarysci.html
    
• Glossaries of Terms Commonly Used in the teaching of Science Subjects
  科技科目辭彙﹝設計與科技、電子與電學及工程科學的英漢/漢英辭彙搜尋﹞
  
  • http://cd.ed.gov.hk/tech/tech_sub/c-tsglossary.htm