Definition from macmillandictionary.com
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Are you strong enough to carry that heavy box?
a singer with a strong voice
a strong punch/kick/blow
a strong fabric/adhesive/rope
a strong friendship/marriage/partnership
You’ve got to be strong and not let their remarks bother you.
She’s a strong swimmer.
They have a very strong hockey team this year.
What are his strong and weak points (=the things he is best and worst at)?
I have particularly strong views on that subject.
I have a strong feeling she’s not coming back.
The government gave a strong argument in favour of increasing tuition fees.
There’s a strong possibility that they’ll marry in the spring.
a strong smell/taste
I had to use strong language (=words that shock people), but I think it worked.
a strong leader/president
a strong wind/current
a strong fortress/army
He speaks French with a strong British accent.
She has very strong features (=you are likely to notice and admire her eyes, nose, and mouth).
There was a strong police presence (=a lot of police officers) at the demonstration.
The crowd was 10,000 strong.