Meaning of “indignant” - Learner’s Dictionary

indignant

adjective uk us /ɪnˈdɪɡnənt/

angry because you have been treated badly or unfairly:

Consumers are indignant at/about the high prices charged by car dealers.
indignantly adverb

"That's not fair!" she said indignantly.

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