What is the meaning of turn on?

verb

• Cause to operate by flipping a switch.
  • usage: "switch on the light"; "turn on the stereo"
  • synonyms: switch on
• Be contingent on.
  • usage: "The outcomes rides on the results of the election"; "Your grade will depends on your homework"
  • synonyms: depend on, devolve on, depend upon, ride, hinge on, hinge upon
• Produce suddenly or automatically.
  • usage: "Turn on the charm"; "turn on the waterworks"
• Become hostile towards.
  • usage: "The dog suddenly turned on the mailman"
• Cause to be agitated, excited, or roused.
  • usage: "The speaker charged up the crowd with his inflammatory remarks"
  • synonyms: agitate, rouse, charge, commove, excite, charge up
• Stimulate sexually.
  • usage: "This movie usually arouses the male audience"
  • synonyms: arouse, sex, excite, wind up
• Get high, stoned, or drugged.
  • usage: "He trips every weekend"
  • synonyms: trip, trip out, get off