A large dictionary of Present-Day English on historical principles, based on citations from a large range of written published English. Includes the first known use of every word sense. Access: Free access from the campus wifi (or via VPN connection) Link: http://www.oed.com/

For historical/diachronic linguistics, the timelines and advanced search functions are especially helpful. It allows you to filter the entire OED for words first attested in a given span of time, borrowed from a specific language or family of languages and/or belonging to specific semantic fields.

The oldest dictionary of American English, based on citations from a large range of published written English. Includes information about etymology, but is not built on historical principles. Access: Free Link: https://www.merriam-webster.com/

Online version "created by the labour and valour of many, maintained by Ondrej Tichý at Charles University in Prague"

http://www.bosworthtoller.com/

Clark Hall is another dictionary of Old English, hosted by the Germanic Lexicon Project. CH Germanic Lexicon Project

The Germanic Lexicon Project by Sean Crist also hosts a range of other resources for the study of Germanic languages whose copyright has expired, e.g. Cleasby & Vigfusson's Dictionary of Old Norse Icelandic.

Pokorny's PIE master etyma

Access: Free Link: https://www.dwds.de/

Access: Free Link: https://www.duden.de/

Access: Free Link: http://woerterbuchnetz.de/cgi-bin/WBNetz/wbgui_py?sigle=DWB

The Wörterbuchnetz (Trier Center for Digital Humanities, Universität Trier 2008) also contains, among other dictionaries, the digital Lexer (Mittelhochdeutsches Handwörterbuch), a dictionary of vulgar Latin and several German dialectal dictionaries. The full list is here: WBNetz

Especially useful for (historical) synonym studies. Allows you to create wonderful timeline visualizations like this one:

With links to the OED.

HTE