turn on

turn someone on

to cause someone to feel excited and very interested. What turns the kids on these days?

See also: turn

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turn on someone

to attack or criticize someone suddenly. He suddenly turned on me and accused me of not supporting him when he needed it. The country's leaders worry that the people could quickly turn on them.

See also: turn

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turn on something

to depend on something in an important way. The success of the talks turns on whether both sides are willing to compromise.

See also: turn