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Below are some suggested E-dictionaries. You may find more dictionaries in LibSearch by using the Subject Headings English language -- Dictionaries.
An English language resource offers quick access to definitions of words, phrases, and idioms, with guidance on style and usage, grammar, and spelling; plus guides for legal and technical writing.
Oxford English Dictionary
Provides the complete text of the printed version of Oxford English Dictionary. The online edition will update new and revised existing entries quarterly. User guide
Oxford Quick Reference
A collection of over 125 core academic subject, language, and quotations dictionaries provides information about a concept, person, or term. User guide
Responsible use of electronic resources 使用電子資源注意事項
Excessive downloading of electronic resources is prohibited. Violation may result in the suspension of access to the e-resources for the whole University. [Click here for additional information.]
Using e-resources from off-campus 校外使用電子資源