au ‧ di ‧ o ‧ guide /ˈɔːdiəʊɡaɪd $ ˈɒːdioʊ-/ BrE AmE noun [countable]
a piece of electronic equipment that visitors to a ↑ museum or ↑ art gallery can use. They carry the audioguide with them and it gives them spoken information about objects or paintings in the museum or gallery.