interlay Syllabification: (in·ter·lay)Definition of interlay verb Pronunciation: /ˌintərˈlā/ (past and past participle interlaid) [with object] lay between or among; interpose:strips of granite are interlaid with creamy Sardinian sard noun Pronunciation: /ˈintərˌlā/ an inserted layer:remember to use interlay under foam-backed carpets Printing a sheet or piece of paper placed between a letterpress printing plate and its base to give increased pressure on certain areas. interlay in other Oxford dictionaries Definition of interlay in the British & World English dictionary