1. turn against - Verb
2. turn against - Phrase
(transitive, idiomatic) To rebel or oppose to something formerly supported.
They turned against their leader.
(transitive, intransitive) To set against or in opposition to something.
She turned her umbrella against the wind.
She turned against the wind.
She turned him against his friends.
(transitive, idiomatic) To use to the disadvantage or injury of.
His argument was turned against him.
They turned their arms against their former allies.
The tyrant grinds down his slaves and they don't turn against him, they crush those beneath them. Emily Brontë
We are still waging Peloponnesian wars. Our control of the material world and our positive science have grown fantastically. But our very achievements turn against us, making politics more random and wars more bestial. George Steiner
I trust you like a brother. Until the day you betray me. You have a parole for what you've done, in return for your teaching, and a better bargain than you deserve, but the day you turn against me, I will tear it up and bury it with you. Robert Jordan
You are wrong if you think Joy emanates only of principaly [sic] from human relation[ships]. God has placed it all around us. It is in everything and anything we might experience. We just have to have the courage to turn against our habitual lifestyle and engage in unconventional living. Christopher McCandless
When crisis hits, we don't turn against each other. No, we listen to each other, we lean on each other, because we are always stronger together. Michelle Obama
But the privileges that one has enjoyed and exploited can sometimes turn against you: nobody thinks of you as a director, you are always an actress. Sophie Marceau