0 to leave a place and go somewhere else -- يُغادِر
She went off with Laurie.
1 If a light or machine goes off, it stops working. -- يَنطَفيء
The heating goes off at ten o’clock.
2 If a bomb or gun goes off, it explodes or fires. -- يِنْفَجِر / يَنْطَلِق
3 If something that makes a noise goes off, it suddenly starts making a noise. -- يَنطلِق / يَرِنّ
4 If food goes off, it stops being good to eat because it is too old. -- يَفسُد (لِلطَعام والشراب)
That milk has gone off.