useful
/ˈjuːsfəl/
adjective
Britannica Dictionary definition of USEFUL
[more useful; most useful]
:
helping to do or achieve something
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a useful invention/tool/skill
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Does anyone have any useful suggestions/advice?
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It can be useful to know CPR.
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The Internet is useful for finding information quickly.
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The therapy is useful as a treatment for diabetes. = The therapy is useful in treating diabetes.
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She has become one of the team's most useful players.
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Why don't you do something useful with your life?
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The data could prove (to be) useful [=people may eventually find that the data is helpful] in identifying future problems.
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I found this information (to be) quite useful.
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Her pocketknife came in useful [=(more commonly) came in handy] when we needed to cut the tangled fishing line.
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I tried to make myself useful [=to be helpful; to do something helpful] by organizing his closet for him.
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the useful life of a satellite [=the amount of time during which a satellite is in good enough condition to be used]
— usefulness
noun
[noncount]