behind
The Italian word 'dietro' is used to indicate something or someone is at the back of or to the rear of something else. It can also indicate being after or later in order or sequence, similar to how it is used in English.
The ball is behind the sofa
In this case the word 'dietro' is used to express the positional relation of an object being behind another.
We are coming from behind
In this instance of use, 'dietro' is used to describe where something is coming from.
Leave everything behind
Here, 'dietro' is used in a more metaphorical sense to imply leaving things behind, both physically and emotionally.