To cause to begin the operation, activity, or flow of:打开，开启：使开始运作、活动或流动：Turn on the light bulb.打开电灯
To begin to display, employ, or exude:开始展示，显露出，流露出：turn on the charm.显露出魅力
Slang【俚语】
To take or cause to take a mind-altering drug, especially for the first time.开始或使开始吸毒，尤指第一次
To be or cause to become interested, pleasurably excited, or stimulated. Often used withto : 使兴奋，使刺激：产生或使产生兴趣、兴奋或刺激。通常与to 连用： My uncle turned me on to jazz. She turned on to surfing this summer.我叔叔使我对爵士乐发生了兴趣。这个夏季她对滑水发生了兴趣