/ˌɒpəˈtju:nɪst ||; ˌɑpɚˈtunɪst/(also opportunistic) adj (usually before a noun 通常用于名词前) making use of an opportunity, especially to get an advantage for yourself; not done in a planned way 利用机会的；非有计划的: an opportunist crime 有机可趁犯下的罪行 ➔opportunist noun [C]: 80% of burglaries are committed by causal opportunists. 80%的盗窃都是人们偶然发现有机可趁才犯下的。