Shot/reverse shot

A shot reverse shot is technique which is used in films. This is commonly used for when one of the characters is shown looking at another character, it is then reversed by showing the other character looking back at the first person on shot. Since the characters are shown facing each other is opposite directions, as a viewer you assume they are looking at each other.

Short reverse shot is a feature of the "classical" Hollywood style of continuity editing.

An example of a shot reverse shot is shown below.

You can see that they have shown the characters are having facing each other by reversing the shots to show each character facing the opposite.