Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

ineffective

play
adjective in·ef·fec·tive \ˌi-nə-ˈfek-tiv\

Simple Definition of ineffective

  • : not producing or having the effect you want : not effective

Source: Merriam-Webster's Learner's Dictionary

Full Definition of ineffective

  1. 1 :  not producing an intended effect :  ineffectual <ineffective lighting>

  2. 2 :  not capable of performing efficiently or as expected :  incapable <an ineffective executive>

ineffectively adverb
ineffectiveness noun

Examples of ineffective in a sentence

  1. The treatment was ineffective against the disease.

  2. <an ineffective effort to reduce unemployment that only spurred inflation>



1649

First Known Use of ineffective

1649


INEFFECTIVE Defined for Kids

ineffective

play
adjective in·ef·fec·tive \ˌi-nə-ˈfek-tiv\

Definition of ineffective for Students

  1. :  not having the desired effect <The medicine was ineffective.>

ineffectively adverb




Seen and Heard

What made you want to look up ineffective? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

the Celtic May Day festival

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

maudlin angry oily prompt
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ