Definition from macmillandictionary.com
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Will you scratch my back for me?
He’s broken his back, but he’s still alive.
She was lying flat on her back on the bed.
Get in the back of the car.
The sun burnt the back of my neck.
What’s that mark on the back of the sofa?
The kids are playing out the back.
a concert programme with Madonna’s autograph on the back
I’ll put my name on the back of the envelope.
A page had been torn out of the back of the book.
a dictionary with a list of irregular verbs at the back