dialectologyPronunciation: /ˌdʌɪəlɛkˈtɒlədʒi/Definition of dialectology noun [mass noun] the branch of linguistics concerned with the study of dialects. Derivatives dialectologicalPronunciation: /-təˈlɒdʒɪk(ə)l/ adjective dialectologist noun dialectology in other Oxford dictionaries Definition of dialectology in the US English dictionary