0 successful or achieving the results that you want: --
The lighting for the production made a very effective use of shadow.
She's a very effective teacher.
This style of decoration is simple yet effective.
How effective a drug is depends on many factors, including how consistently the patient follows the instructions for taking it.
1 in fact, although not officially: --
Although she's not officially our boss, she's in effective control of the office.
2 If a law or rule becomes effective, it starts to be used: --
3 producing the intended results, or (of a person) skilled or able to do something well: --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.