Question for deep-q learning Algo

[rajanlagah]

I was telling my code of deep learning with yours.
I was stuck on

Deep Q Learning/Space Invaders/DQN Atari Space Invaders.ipynb

                for i in range(0, len(batch)):
                    terminal = dones_mb[i]

                    # If we are in a terminal state, only equals reward
                    if terminal:
                        target_Qs_batch.append(rewards_mb[i])

What is terminal state here ?
WIN and LOOSE ?
bcoz then u terminate the game and restart it.