English-English Dictionary

Meaning of the word effective in English

What does effective mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

effective

US /əˈfek.tɪv/
UK /əˈfek.tɪv/
"effective" picture

Adjective

1.

successful in producing a desired or intended result

Example:
•
The new policy proved to be very effective in reducing crime.
•
This medicine is highly effective against the flu.
Synonym:
efficacioussuccessfulproductivepotentpowerful
Synonym:
ineffectiveuseless
2.

(of a law or agreement) coming into operation or effect

Example:
•
The new regulations will be effective from January 1st.
•
The contract is effective immediately.
Synonym:
operativevalidbindingin force
Synonym:
ineffectiveinvalid
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Related Word:
effecteffectivelyeffectivenessin effectto no effectto that effectgreenhouse effect