wave model
model of language change in which a new language feature (innovation) or a new combination of language features spreads from its region of origin, affecting a gradually expanding cluster of dialects
en-US/ˈweɪv ˈmɑdəl/
en-GB/ˈweɪv ˈmɒdəl/
model of language change in which a new language feature (innovation) or a new combination of language features spreads from its region of origin, affecting a gradually expanding cluster of dialects