functionautomatically
adverbUK /ˈfʌŋkʃən ˌɔːtəˈmætɪkli/
US /ˈfʌŋkʃən ˌɔːtəˈmætɪkli/
It means something works by itself without a person doing anything.
The lights function automatically when it gets dark.
RELATED WORDS
OTHER MEANINGS
2. To operate on its own without needing a person to start it.
The door will function automatically when you walk near it.
3. To do a job by itself as part of a machine or system.
The heater can function automatically all night.
4. To work in a self-running way without extra help.
The app updates function automatically in the background.