OED Oxford English Dictionary

URL
https://go.openathens.net/redirector/andersonuniversity.edu?url=https%3A%2F%2Fwww.oed.com%2F

The historical English dictionary: an unsurpassed guide for researchers in any discipline to the meaning, history, and usage of over 500,000 words and phrases across the English-speaking world. The OED is widely regarded as the accepted authority on the English language. (Oxford)