What is the meaning of turned on?

verb

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

adjective

• Feeling great sexual desire.
  • usage: "feeling horny"
  • synonyms: aroused, horny, randy, ruttish, steamy