au‧to‧mat‧ic 1 S3 AC / ɔtəmætɪk◂ $ ɒ- / 形容词

1 an automatic machine is designed to work without needing someone to operate it for each part of a process → manual :

an automatic weapon

an automatic gearbox

My camera is fully automatic .

2 something that is automatic always happens as a result of something you have done, especially because of a rule or law :

Littering results in an automatic fine.

3 done without thinking, especially because you have done the same thing many times before :

Practise the breathing techniques until they become automatic.