Meaning of “spark” - Learner’s Dictionary

spark

noun [ C ] uk us /spɑːk/
FIRE

a very small, bright piece of burning material:

The fire was caused by a spark from a cigarette.
ELECTRICITY
START

a small idea or event that causes something bigger to start:

a spark of hope/inspiration

(Definition of “spark noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)