COSTLY Meaning of COSTLY in English cost|ly BrE AmE ˈkɒs t |li ˈkɔːs t - AmE ˈkɔːs t |li ˈkɑːs t - ▷ cost|lier li‿ə AmE li‿ ə r▷ cost|liest li‿ɪst li‿əst ▷ cost|liness li nəs li nɪs Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012