Meaning of “quietly” - Learner’s Dictionary

quietly

adverb uk us /ˈkwaɪətli/
WITHOUT NOISE

B1 making little or no noise:

"Don't worry," she said quietly.
WITHOUT ACTIVITY

B1 doing something without much noise or activity:

He sat quietly on the sofa, waiting for her to come home.

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