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turn against (someone or something)
1. To defy, revolt against, or become antagonistic toward someone or something. The majority of his supporters turned against him after he failed to keep his election promises. Polls indicate that voters have turned against the proposed legislation.
2. To make or cause someone or something to defy, revolt against, or become antagonistic toward someone or something. In this usage, a noun or pronoun is used between "turn" and "against." The company's unscrupulous move has turned even their most loyal customers against them. Can't you see that he's trying to turn Jim against you?
turn someone or something against someone or something
to cause someone to defy or revolt against someone or something; to make someone antagonistic toward someone or something. He turned the whole board against Molly. She turned the city council against the proposed law.
Become or make antagonistic to, as in Adolescents often turn against their parents, but only temporarily, or She turned him against his colleagues by telling him they were spying on him. [First half of 1800s]
1. To change one's actions or attitudes to be against someone or something; become hostile or antagonistic toward someone or something: The peasants turned against the cruel ruler.
2. To cause someone or something to act or go against someone or something; make someone or something antagonistic toward someone or something: The scandal turned public opinion against the candidate. They turned my family against me.