Here are some synonyms:
* wronged
* offended
* injured
* harmed
* distressed
* upset
* disgruntled
In legal context, "aggrieved" often refers to a person who has suffered a legal wrong or whose rights have been violated. They are the party who can bring a legal action to seek redress for their grievance.
Here are some examples of how "aggrieved" can be used:
* "The aggrieved customer demanded a refund after finding a dead insect in her meal."
* "The judge ruled that the plaintiff was not an aggrieved party and dismissed the case."
* "The union members were feeling aggrieved after the company announced layoffs."