Definition from macmillandictionary.com
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a beautiful woman with big eyes
He kept all his secret papers in a big box.
At the end of the lane was a great big house.
A big man stood in the doorway.
The company faces big problems.
The concerts have been a big success.
They were big fans of the Beatles.
a type of music that is big in America
We have another big game next week.
I had never been involved in making the big decisions before.
Big changes are likely to be made.
The place was full of big businessmen.
Her mother is big in daytime television.
Other stores struggle to compete with the big four retailers.
Big Tobacco (=the major cigarette companies)
an important victory for Big Oil
Come on, you’re a big girl now (=old enough to behave like an adult).
This is my big brother, Jake.