1. (verb)turn-on something causingexcitement or stimulating interest
2. (verb)switch on, turn on cause to operate by flipping a switch "switch on the light"; "turn on the stereo"
3. (verb)depend on, devolve on, depend upon, ride, turn on, hinge on, hinge upon be contingent on "The outcomes rides on the results of the election"; "Your grade will depends on your homework"
4. (verb)turn on produce suddenly or automatically "Turn on the charm"; "turn on the waterworks"
5. (verb)turn on become hostile towards "The dog suddenly turned on the mailman"
6. (verb)agitate, rouse, turn on, charge, commove, excite, charge up cause to be agitated, excited, or roused "The speaker charged up the crowd with his inflammatory remarks"
7. (verb)arouse, sex, excite, turn on, wind up stimulate sexually "This movie usually arouses the male audience"
8. (verb)trip, trip out, turn on, get off get high, stoned, or drugged "He trips every weekend"
Definitions of turn on 
Afrikaans: aanskakel, oopdraai
Arabic: يُشَغَل الجِهاز او التَّي
Bulgarian: включвам
Brazilian: ligar
Czech: otevřít, zapnout
German: aufdrehen
Danish: åbne for
Greek: ανοίγω
Spanish: abrir, encender, conectar
Estonian: lahti keerama, avama
Farsi: باز کردن
Finnish: avata
French: ouvrir, allumer
Hebrew: לִפתוֹחַ
Hindi: प्रवाह आरंभ करना
Croatian: otvoriti, pustiti da teče
Hungarian: megereszt (vizet), kinyit
Indonesian: menghidupkan
Icelandic: kveikjaá
Italian: accendere
Japanese: ひねって(～を)出す
Korean: (수도, 가스가) 흐르게 하다
Lithuanian: įjungti, atsukti
Latvian: ieslēgt
Malay: menghidupkan; membuka
Dutch: openzetten
Norwegian: åpne for, skru/slå på
Polish: otworzyć, włączyć
Persian: باز کردن
Pashto: پرانیستل، خلاصول
Portuguese: ligar
Romanian: a deschide; a aprinde
Russian: включать; зажигать
Slovak: otvoriť, zapnúť
Slovenian: odpreti
Serbian: odvrnuti
Swedish: sätta (slå, vrida) på
Thai: เปิด
Turkish: açmak
Taiwanese: 開（通）（水、電）
Ukrainian: пускати; вмикати
Urdu: بہاؤ چالو کرنا
Vietnamese: bật, vặn nước
Chinese: 开（通）（水、电）
