turn on

cause to operate by flipping a switch; "switch on the light"; "turn on the stereo"

be contingent on; "The outcomes rides on the results of the election"; "Your grade will depends on your homework"

produce suddenly or automatically; "Turn on the charm"; "turn on the waterworks"

become hostile towards; "The dog suddenly turned on the mailman"

cause to be agitated, excited, or roused; "The speaker charged up the crowd with his inflammatory remarks"

stimulate sexually; "This movie usually arouses the male audience"

get high, stoned, or drugged; "He trips every weekend"