0 of no use; not working or not achieving what is needed:
You're absolutely useless - can't you even go to the shops without getting lost!
She's very good at methodical work, but useless when there's a lot of pressure.
[ + to infinitive ] It's useless to speculate without more information.
Without fuel, the vehicles will become useless for moving supplies.
With dead batteries, the flashlight was useless.
In her panic to get away with it to parents - who are useless - she concocted the story.
Even a complete record of the student's brain activity would be useless without some way to extract useful information from it.
Indeed, one's judgement was useless, unless reached without coercion.
However, a mark that can be identified only by resolving the ver y question that the mark is supposed to resolve is useless.
On the other hand a profile that fails to provide the user with required material is equally useless, however brief it may be.
Personal conviction on its own is useless, yet within the politics of poststructuralism this is all we can call on.
One should not draw the conclusion that this book is useless or that it represents bad scholarship.
While professing respect for that culture, the physicians insisted the family not be allowed to dictate useless treatment.
