Reference books provide overview information for a variety of topics. If you are unfamiliar with your research topic, a general reference source (ex. encyclopedia) is a great place to start!
Cambridge Dictionaries Online - An online resource providing access to entries Cambridge publications: Cambridge International Dictionary of English, Cambridge Learner's Dictionary, Cambridge Dictionary of American English, Cambridge International Dictionary of Idioms, Cambridge International Dictionary of Phrasal Verbs, Cambridge Klett Bilingual Dictionary-French/English and Cambridge Klett Bilingual Dictionary-Spanish/English.
Merriam-Webster's Collegiate Dictionary Online - Includes a thesaurus, reverse dictionary, rhyming dictionary and more.
The Opposing Viewpoints database is a premier full-text resource covering today’s hottest social issues. It provides a variety of sources on many topics. The types of resources can include:
Viewpoint essays (Pro and Con Perspectives on an issue)