Definition
to retreat swiftly from someone or something, often due to fear.
Faced with the sudden danger, they fell back swiftly without a second thought.
Seeing the large wild animal, they instinctively fell back.
She fell back in fright due to her fear.
When an army withdraws to avoid confrontation with an adversary.
When faced with a formidable enemy, the troops decided to fall back to protect themselves.
To avoid confrontation, the commander ordered the army to fall back.
After the fierce battle, the troops had to fall back.