effective

2 ENTRIES FOUND:

effective /ɪˈfɛktɪv/ adjective

effective

/ɪˈfɛktɪv/

adjective

Learner's definition of EFFECTIVE

[more effective; most effective] : producing a result that is wanted : having an intended effect产生预期效果的；能达到预期目的的

drugs effective in the treatment of a disease = drugs effective in treating a disease = drugs effective against a disease有效治疗一种疾病的药物
It's a simple but effective technique.这是简单但有效的技术。
He gave an effective speech.他做了一次有影响的演讲。

— opposite ineffective

of a law, rule, etc. : in use : active （法律、规则等）生效的，起作用的

The law becomes effective [=the law takes effect; the law will start to be used] next year.这一法律明年开始生效。
the effective date of the law [=the day when the law starts to be used]法律的生效日期

: starting at a particular time — used to introduce a clause（用于引导从句）从…时间开始

Effective [=starting, as of] tomorrow, the store will be open until 8:00 p.m. every day.从明天起，商店每天将营业至晚8点。
Effective next month, the landfill will no longer accept old televisions.从下个月开始，这个垃圾填埋场将不再接收废旧电视机。

always used before a noun — used to describe something that exists or has an effect but that is not officially stated or recognized实际的；事实上的

— effectiveness

noun [noncount]