I. transitive verb
1. : to cause to flow by or as if by opening a valve or tap
turn the water on full
her charm could be turned on and off at will
2. : to cause to operate
turn the radio on
II. transitive verb
( -s )
1. : to cause to undergo an intense visionary experience especially by taking a drug ; broadly : to cause to get high
2. : to excite pleasurably : stimulate
the ballet … was turning the audience on like magic — Clive Barnes
also : to excite sexually
3. : to cause to gain knowledge or appreciation of something specified
intransitive verb
1. : to undergo an intense visionary experience especially as a result of taking a drug ; broadly : to get high
2. : to become pleasurably excited
turns on instead with classical music or jazz — Julie M. Heldman
• turn-on ˈ ̷ ̷ ˌ ̷ ̷ noun