aggravation

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act of aggravating or the state of being aggravated.
• noun A source of continuing, increasing irritation or trouble.
• noun Exasperation.

from The Century Dictionary.

• noun Increase of the weight, intensity, heinousness, or severity of anything; the act of making worse; addition, or that which is added, to anything evil or improper: as, an aggravation of pain, grief, crime, etc.
• noun Exaggeration, as in a pictorial representation or in a statement of facts; heightened description.
• noun Provocation; irritation.
• noun In Rom. canon law, a censure, threatening excommunication after disregard of three admonitions.

from the GNU version of the Collaborative International Dictionary of English.

• noun 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.
• noun Exaggerated representation.
• noun An extrinsic circumstance or accident which increases the guilt of a crime or the misery of a calamity.
• noun colloq. Provocation; irritation.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun 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.
• noun Exaggerated representation.
• noun An extrinsic circumstance or accident which increases the guilt of a crime or the misery of a calamity.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an exasperated feeling of annoyance
• noun action that makes a problem or a disease (or its symptoms) worse
• noun unfriendly behavior that causes anger or resentment