effective
//ɪˈfɛktɪv//
Adjective
more effectiveComparative
most effectiveSuperlative
1
Successful in producing a desired or intended result; achieving the purpose.
This medicine is effective against headaches.
2
Actually in operation or in force; operative.
The new law becomes effective next month.
3
Impressive or striking in appearance; making a strong impression.
The painting makes an effective display in the gallery entrance.