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Below, we’ve provide links to the dictionaries and thesauri that have online interfaces. If English is not your first language, see the ESL Resources page for dictionaries designed for advanced students of English.
Webster’s Third New International Dictionary—Over 450,000 entries; you’ll need a UCLA logon ID and password.
Merriam-Webster OnLine—Over 225,000 entries; based on the print version of Merriam-Webster's Collegiate Dictionary (11th ed.).
The Oxford Dictionary of English—Over 355,000 entries; you’ll need a UCLA logon ID and password.
The New Oxford American Dictionary—Over 250,000 entries; you’ll need a UCLA logon ID and password.
Oxford English Dictionary Online—Over 500,000 entries; the OED is really useful when you want to know the evolution of a word’s meaning and identify the first recorded usages. You’ll need a UCLA logon ID and password.
MacMillan Dictionary and Thesaurus--First search for dictionary entries, and then find thesaurus entries for each dictionary entry.
Merriam-Webster OnLine—Make sure to select the “Thesaurus” button. It’s unclear whether this is based on the print version of Merriam-Webster’s Collegiate Thesaurus, which has over 340,000 entries.
Roget’s International Thesaurus—The classic 1922 work; it’s unclear how many entries there are.
This page was created by Andrea Olinger. To suggest a resource or report a broken link, email the GWC at email@example.com.