1
- successful in produc-ing a desired or intended result能产生（预期）效果的, 有效的：
effective solutions to environmental problems.
解决环境问题的有效办法。
1.1
- (especially of a law or policy) operative（尤指法律或政策）生效的, 起作用的：
the agreements will be effective from November.
协议将于11月起生效。
2
- attrib. fulfilling a specified function in fact, though not formally acknowledged as such实际的, 事实上的：
the companies were under effective Soviet control.
这些公司实际上由苏联控制。
2.1
- assessed according to actual rather than face value（价值）实际的; 按实际价值评估的：
an effective price of £176 million.
1.76亿英镑的实际价格。
- a soldier fit and available for service实际可作战的士兵。
派生词
effectively
adverb实际上, 这就意味着公司将可能不受监管
effectiveness
nouneffectivity
noun词源
late Middle English: from Latin effectivus, from efficere 'work out, accomplish' （see EFFECT）.