Definition of “jolt” - Learner’s Dictionary

jolt

noun [ C ] uk us /dʒəʊlt/
SUDDEN MOVEMENT

a sudden, violent movement:

With a sudden jolt the train started moving again.
SHOCK

an unpleasant shock or surprise:

The reminder that he was dead gave her a jolt.

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