Definition from macmillandictionary.com
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Both main parties are backing these proposals.
We’ll back you all the way on this one!
Schools need to have clear rules on bullying, backed by a system of punishments.
She backed out of the room carrying a tray.
He backed me into a corner at the party.
Could you just back onto the driveway?
I’m backing France to win the championship.
a large garden backed by trees
Manilow was backed by a full orchestra.