/ ˈjuːsləs; NAmE / adjective
1.
useless (to do sth) | useless (doing sth) not useful; not doing or achieving what is needed or wanted :
This pen is useless.
He knew it was useless to protest.
It's useless worrying about it.
She tried to work, but it was useless (= she wasn't able to) .
2.
useless (at doing sth) ( informal ) not very good at sth; not able to do things well :
I'm useless at French.
Don't ask her to help. She's useless.
► use·less·ly adverb
► use·less·ness noun [ U ]