What does "die back" mean?

To wither, particularly during the winter.

What is a synonym for "die back"?

Common synonyms include: decline, declining, deteriorating, die down, diminish, dying.

verb

verb ·Uncommon ·Advanced level

Verb

1
To wither, particularly during the winter.
"The same walls, when the Virginia creeper dies back in winter, show a date-mark of 1490."
2
suffer from a disease that kills shoots wordnet

"The same walls, when the Virginia creeper dies back in winter, show a date-mark of 1490."