Meaning of USEFUL in English

USEFUL

/ ˈjuːsfl; NAmE / adjective

1.

useful (to do sth) | useful (to sb) | useful (for sth / for doing sth) that can help you to do or achieve what you want :

a useful gadget

It can be useful to write a short summary of your argument first.

He might be useful to us.

These plants are particularly useful for brightening up shady areas.

Don't just sit watching television— make yourself useful !

This information could prove useful .

Your knowledge of German may come in useful (= be useful in a particular situation) .

Some products can be recycled at the end of their useful life.

2.

( BrE , informal ) good; of the right standard

SYN competent :

He's a very useful player.

►  use·ful·ly / -fəli; NAmE / adverb :

The money could be more usefully spent on new equipment.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.