[n] action that makes a problem or a disease (or its symptoms) worse; "the aggravation of her condition resulted from lack of care"
[n] unfriendly behavior that causes anger or resentment
[n] an exasperated feeling of annoyance
\Ag`gra*va"tion\, n. [LL. aggravatio: cf. F. aggravation.]
1. The act of aggravating, or making worse; -- used of evils, natural or moral; the act of increasing in severity or heinousness; something additional to a crime or wrong and enhancing its guilt or injurious consequences.
2. Exaggerated representation. By a little aggravation of the features changed it into the Saracen's head. --Addison.
3. An extrinsic circumstance or accident which increases the guilt of a crime or the misery of a calamity.
4. Provocation; irritation. [Colloq.] --Dickens.