An Oxford-based research project, the Dictionary of Medieval Latin from British Sources is a dictionary of medieval Latin in the British Isles from 540CE to 1600CE based entirely on original research. Published through Brepolis, the online version presents the contents of the print dictionary in a searchable format. Drawing only on sources from the British Isles, the dictionary shows localized usages of Latin words.
There are two versions of the DMLBS. The free version is available through Logeion and can only be searched by keyword. The paid version published by Brepols has more extensive search features and is accessible through Brepolis. On that version, a user may create advanced searches that include or exclude terms as well as browse an index of headwords.
Geiriadur Prifysgol Cymru: A Dictionary of the Welsh Language (GPC) is the online version of A Dictionary of the Welsh Language, the historical dictionary of Welsh similar in scope to the Oxford English Dictionary. Funded by the Welsh government, the decades-long print project was completed in 2001 and the digital version was begun in 2011 and is an ongoing project. The GPC contains entries dating back to the earliest references to Welsh and contains many entries spanning the medieval period. Entries contain grammatical information as well as a definition and dated historical sources to the words under consideration. Users may search entries in either Welsh or English.
The project is free to use and has an active web presence that updates users on the project’s status.
Logeion is a free online dictionary that aggregates the resources of all the Latin and Greek dictionaries available through the Perseus Classical collection in addition to other resources like the Dictionary of Medieval Latin from British Sources. A user can search by headword or an inverse search and use the tabs to switch between dictionary sources, including: Lewis and Short, Gaffiot, and others. The website also provides basic corpus analysis, offering examples of the word in sentences as well as providing morphological analysis. Though not all sources in the project are medieval, some, like the Dictionary of Medieval Latin from British Sources, are predominantly medieval.
The Dictionary of Old Norse Prose (ONP) is an online dictionary containing over 50,000 words derived from texts of Old Norse prose. Published by the University of Copenhagen, the project is ongoing as of 2020 with new words added regularly. The dictionary is searchable in a number of ways: by headword, text, manuscript, type of word, and numerous others. ONP makes it corpus data freely downloadable and has added information like the genre of text from which the word derives or whether it used in poetry or legal texts as well. Users can also view the words contained in particular texts or manuscripts and download that data for research purposes. When available, the ONP links to images of manuscripts and freely available editions of texts. Dictionary entries contain a list of sources in which the word appears in addition to its grammatical qualities.
Additionally, the project includes an expansive bibliography and has an active social media presence that offers a word-of-the-day feature.
Published by the University of Glasgow, the Thesaurus of Old English Project is an online resource that thematically arranges definitions of terms. Drawing from standard dictionaries of Old English, the project has created thematic entries that are cross referenced with one another. The project is fully searchable; while searching, a user may go directly to the thesaurus’ data or be directed off-site to one of the major dictionaries of Old English. The project has well over 40,000 entries.
Though free to use for individual users, the project makes explicit that large-scale use of data from the project is not allowed. Should users wish to analyze the Thesaurus’ corpus data, they should contact the creators.