detent
/dɪˈtɛnt/
noun
- A device, such as a catch or spring, that temporarily stops or holds a mechanism in a certain position until released.
- The detent on the folding knife keeps the blade securely open.
- When you turn the knob, you can feel a detent that locks it into place.
- The detent in the gear shifter helps the driver feel when the car is in park.