effective Definition

  • 1successful in producing a desired or intended result
  • 2(of rules or laws) in operation or in force; functioning

Using effective: Examples

Take a moment to familiarize yourself with how "effective" can be used in various situations through the following examples!

  • Example

    The new drug has been very effective in treating the disease.

  • Example

    The company implemented an effective marketing strategy.

  • Example

    The team's defense was very effective against the opponent's offense.

  • Example

    The law will become effective next month.

effective Synonyms and Antonyms

Idioms Using effective

  • to start to produce a result or have an impact


    The new law will take effect next year.

  • to start being used or enforced


    The new regulations will come into effect next month.

  • starting right away


    The new policy is effective immediately.

Phrases with effective

  • cost-effective

    producing good results without costing a lot of money


    The company chose a cost-effective solution for their production process.

  • time-effective

    producing good results without taking a lot of time


    The new software is much more time-effective than the old one.

  • energy-effective

    producing good results without using a lot of energy


    The new building design is very energy-effective, reducing electricity consumption by 50%.

Origins of effective

from Latin 'effectivus', from 'effectus', meaning 'accomplishment'


Summary: effective in Brief

The term 'effective' [ɪˈfɛktɪv] refers to something that is successful in producing a desired result or is in operation. It can be used to describe anything from a drug that treats a disease to a marketing strategy that increases sales. 'Effective' can also be used in phrases like 'cost-effective' and 'time-effective,' which describe methods that produce good results without costing a lot of money or taking a lot of time. Idioms like 'take effect' and 'come into effect' describe when something starts to produce a result or is enforced.

How do native speakers use this expression?