Definition from macmillandictionary.com
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a valley surrounded by wooded hills
the Pentland Hills
an area popular with hill walkers
They climbed slowly to the top of the hill.
The village is built on a steep hill.
We went walking in the hills.
Go up the hill and turn right at the lights.
A motorcycle appeared over the brow of the hill.
In my opinion, this is not a hill to die on.
Not every hill is worth dying on.
Is this the hill you want to die on?