gen ‧ tri ‧ fi ‧ ca ‧ tion /ˌdʒentrəfəˈkeɪʃ ə n, ˌdʒentrɪfəˈkeɪʃ ə n/ BrE AmE noun [uncountable]
a gradual process in which an area in bad condition where poor people live is changed by people with more money coming to live there and improving it
—gentrify /ˈdʒentrəfaɪ, ˈdʒentrɪfaɪ/ verb [transitive usually passive]