de·fin·i·tive/dɪ`fɪnətɪv; dɪˈfɪnɪtɪv/ adj 1 the definitive book, film etc about something is the one that is thought to be the best and cannot be improved 〔关于某主题的书、电影等中〕最佳的，权威性的 2 a definitive statement, answer etc is certain and will not be changed 〔陈述、答复等〕确定的，不可更改的: There is no definitive answer to the problem. 这一问题没有确定的答案。