[turn on] vt (1833) 1: to activate or cause to flow, operate, or function by or as if by turning a control "turn the water on full" "turn on the power"
2. a: to cause to undergo an intense often visionary experience by taking a drug; broadly: to cause to get high b: to move pleasurably "rock music turns her on"; also: to excite sexually c: to cause to gain knowledge or appreciation of something specified "turned her on to ballet" ~ vi: to become turned on -- turn-on n