The English Dialect Dictionary (EDD) is a dictionary of English dialects, compiled by Joseph Wright (1855–1930).
The English Dialect Dictionary, being the complete vocabulary of all dialect words still in use, or known to have been in use during the last two hundred years; founded on the publications of the English Dialect Society and on a large amount of material never before printed was published by Oxford University Press in 6 volumes between 1898 and 1905. Its compilation and printing was funded privately by Joseph Wright, a self-taught philologist at the University of Oxford. Vol. 1: A-C; Vol. 2: D-G; Vol. 3: H-L; Vol. 4: M-Q; Vol. 5: R-S; Vol. 6: T-Z, supplement, bibliography and grammar. The content was issued progressively as 28 parts intended for binding into the six volumes with publication dates of 1898, 1900, 1902, 1903, 1904 & 1905. Vol. 6 includes an invaluable list of writings in dialect arranged by counties.
Due to the scale of the work, 70,000 entries, and the period in which the information was gathered, it is regarded as a standard work in the historical study of dialect. Wright marked annotations and corrections in a cut-up and rebound copy of the first edition; this copy is among Wright's papers in the Bodleian Library at the University of Oxford.
The sixth volume includes the English Dialect Grammar, which was also published separately. This included 16,000 dialectal forms across two main sections: 'Phonology', which gave a historical description of the development of sounds in dialect; and 'Accidence', which gave details on grammar and especially on morphology. Among linguists, the Dialect Grammar has been criticised more than the Dialect Dictionary itself. KM Petyt argued that the symbols and geographical areas used are excessively vague. Wright has also been accused of borrowing material from the work of Alexander John Ellis that he had previously criticised. Graham Shorrocks wrote, "Anderson also pointed out that Wright himself used equally unreliable methods in his English Dialect Grammar, took over a lot of Ellis's material, and even distorted some of it by generalizing from precisely localized material." Warren Maguire claims that almost all of the Grammar's data on the north-east of England was copied from Ellis.