American English

Definition of turn on phrasal verb from the Oxford Advanced American Dictionary

 

turn on

 phrasal verb
phrasal verb
 
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Phrasal Verbs

turn on somebody

 
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to attack someone suddenly and unexpectedly The dogs suddenly turned on each other. Why are you all turning on me (= criticizing or blaming me)?

    turn on something

    [no passive]
     
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  1. 1 to depend on something Much turns on the outcome of the current peace talks.
  2. 2 [no passive] to have something as its main topic The discussion turned on the need to raise standards.

turn somebodyon

(informal)
 
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to make someone excited or interested, especially sexually Jazz has never really turned me on. She gets turned on by men in uniform. related noun turn-on

turn somebody on (to something)

(informal)
 
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to make someone become interested in something or use something for the first time He turned her on to jazz.

turn somethingon

 
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to start the flow of electricity, gas, water, etc. by moving a switch, button, etc. to turn on the heat I'll turn the television on. (figurative) He really knows how to turn on the charm (= suddenly become pleasant and attractive).
See the Oxford Advanced Learner's Dictionary entry: turn on