Longman Dictionary of Contemporary English homepage

ineffective

adjective
     
in‧ef‧fec‧tive
something that is ineffective does not achieve what it is intended to achieve [≠ effective]
ineffective in doing something
The chemical was almost totally ineffective in killing the weeds.
ineffective against
Various drugs have proved ineffective against the virus.
an ineffective marketing campaign
ineffectively adverb
ineffectiveness noun [uncountable]
the ineffectiveness of most diets

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary