turn on

British  

verb

1. (tr, adverb) to cause (something) to operate by turning a knob, etc

   to turn on the light

2. (intr, preposition) to depend or hinge on

   the success of the party turns on you

3. (preposition) to change or cause to change one's attitude so as to become hostile or to retaliate

   the dog turned on the children

4. informal (tr, adverb) to produce (charm, tears, etc) suddenly or automatically

5. informal to interest (someone) in something

   how to turn kids on to drama

6. slang (tr, adverb) to arouse emotionally or sexually

7. slang (intr, adverb) to take or become intoxicated by drugs

8. slang (tr, adverb) to introduce (someone) to drugs

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noun

1. slang a person or thing that causes emotional or sexual arousal

turn on Idioms  

1. Cause to begin the operation, flow, or activity of, as in Turn on the lights, please , or Don't turn on the sprinkler yet . [First half of 1800s]

2. Begin to display, employ, or exude, as in He turned on the charm . [Late 1800s]

3. Also, . Take or cause to take a mind-altering drug, as in The boys were excited about turning on , or They tried to get her high , or I told them I wouldn't get on tonight . [ Slang ; mid-1900s]

4. Be or cause to become excited or interested, as in His mother was the first to turn him on to classical music . [c. 1900]

5. Be or become sexually aroused, as in He blushed when she asked him what turned him on . [Second half of 1900s]

6. Also, turn upon . Depend on, relate to, as in The entire plot turns on mistaken identity . This usage, first recorded in 1661, uses turn in the sense of “revolve on an axis or hinge.”

7. Also, turn upon . Attack, become hostile toward, as in Although normally friendly, the dog suddenly turned on everyone who came to the door . Also see turn against .

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Example Sentences

“When cameras were first issued, failing to turn on was a training issue,” said Max Huntsman, a former public corruption prosecutor who later served as inspector general for Los Angeles County Sheriff’s Department.

From Los Angeles Times • May 12, 2026

Carragher says Benitez told Owen, who in 2001 had won the Ballon d'Or, he needed to learn to "turn on the ball quicker".

From BBC • May 12, 2026

Each of Ms. Enyedi’s three stories, then, turn on characters in awe of plants, and in search of understanding.

From The Wall Street Journal • May 7, 2026

Very quickly we changed to, 'it didn't work out, let's turn on to the other one and push to achieve what we want this season'.

From BBC • Apr. 24, 2026

I turn on the sink, splash some water around, until I hear her clunky shoes tap-tap-tap away down the hall.

From "Wayward Creatures" by Dayna Lorentz

Related Words

• activate
• log on
• put on
• switch on