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Cymraeg

Welcome to Geiriadur Prifysgol Cymru

GPC is the only standard historical dictionary of the Welsh language.
It is broadly comparable in method and scope to the Oxford English Dictionary.

It presents the vocabulary of the Welsh language from the earliest Old Welsh texts, through the abundant literature of the Medieval and Modern periods, to the huge expansion in
vocabulary resulting from the wider use of Welsh in all aspects of life in the last half century.
This vocabulary is defined in Welsh, and English equivalents are also given. Detailed attention is given to variant forms, collocations, and etymology.

The work is based on an ever-expanding collection of over two million citation slips gathered from a range of texts over many years.

Click here to read about the Dictionary at the National Eisteddfod

Launching the Friends

Friends of the Dictionary logo.Saturday June 17th in Aberystwyth saw the successful launching of our Friends of the Dictionary. The society’s president, chaired bard Myrddin ap Dafydd, outlined the benefits of being a Dictionary Friend. Click here to read more.


GPC apps

Take the GPC Dictionary with you wherever you go. Why not download our free Android or iOS app? Use the App Support page to view the user guide and answers to common questions.

Word Of The Day – click Word Of The Day for today’s selection from the dictionary.
Dictionary – to search for a word using the full dictionary click GPC Online


Information for Coleg Cymraeg Staff and Students


Useful links: There are a number of useful Welsh dictionaries and term banks online. You can find a list of them here.

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Part funded by Welsh Government           Approved by Dictionary Portal          Gift Aid link