automaticaction

noun
UK /ˌɔːtəˈmætɪk ˈækʃən/
US /ˌɔːtəˈmætɪk ˈækʃən/

Something your body does all by itself without you thinking about it.

Blinking is an automatic action that keeps your eyes wet.


OTHER MEANINGS

2. A machine or process that works by itself without a person controlling it.

The door's automatic action lets it open when someone walks near.

3. Something done without thinking or planning, like a habit.

Checking his phone first thing in the morning had become an automatic action.

4. In computing, a step a program performs on its own.

The app's automatic action saves your work every few minutes.