anger

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

• noun A strong feeling of displeasure or hostility.
• intransitive verb To make angry; enrage or provoke.
• intransitive verb To become angry.

from The Century Dictionary.

• To grieve; trouble; distress; afflict.
• To make painful; cause to smart; inflame; irritate: as, to anger an ulcer. Bacon.
• To excite to anger or wrath; rouse resentment in.
• Synonyms To irritate, chafe, provoke, vex, enrage, exasperate, infuriate.
• To become angry.
• noun Grief; trouble; distress; anguish.
• noun A revengeful passion or emotion directed against one who inflicts a real or supposed wrong; “uneasiness or discomposure of mind upon the receipt of any injury, with a present purpose of revenge,” Locke; wrath; ire.
• noun An individual fit of anger; an expression of anger, as a threat: in this sense it may be used in the plural.
• noun Pain or smart, as of a sore or swelling. This sense is still retained by the adjective. See angry, 8.
• noun Synonyms Anger, Vexation, Indignation, Resentment, Wrath, Ire, Choler, Rage, Fury, passion, displeasure, dudgeon, irritation, gall, bile, spleen. Vexation is the least forcible of these words, expressing the annoyance and impatient chafing of one whose mood has been crossed, whose expectations have not been realized, etc. Indignation may be the most high-minded and unselfish; it is intense feeling in view of grossly unworthy conduct, whether toward one's self or toward others. The other words denote almost exclusively feeling excited by the sense of personal injury. Anger is a sudden violent feeling of displeasure over injury, disobedience, etc., accompanied by a retaliatory impulse; it easily becomes excessive, and its manifestation is generally accompanied by a loss of self-control. Resentment is the broadest in its meaning, denoting the instinctive and proper recoil of feeling when one is injured, and often a deep and bitter brooding over past wrongs, with a consequent hatred and settled desire for vengeance; it is, in the latter sense, the coolest and most permanent of these feelings. Wrath and ire express sudden feeling of great power, and are often associated with the notion of the superiority of the person: as, the wrath of Jove, the ire of Achilles. They are often the result of wounded pride. Ire is poetic. Wrath has also an exalted sense, expressive of a lofty indignation visiting justice upon wrong-doing. Rage is an outburst of anger, with little or no self-control; fury is even more violent than rage, rising almost to madness. The chief characteristic of choler is quickness to rise; it is irascibility, easily breaking into a high degree of resentful feeling.
• noun An occasional spelling of angor.

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

• transitive verb obsolete To make painful; to cause to smart; to inflame.
• transitive verb To excite to anger; to enrage; to provoke.
• noun obsolete Trouble; vexation; also, physical pain or smart of a sore, etc.
• noun A strong passion or emotion of displeasure or antagonism, excited by a real or supposed injury or insult to one's self or others, or by the intent to do such injury.

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

• noun A strong feeling of displeasure, hostility or antagonism towards someone or something, usually combined with an urge to harm.
• noun obsolete Pain or stinging.
• verb transitive To cause such a feeling of antagonism.
• verb intransitive To become angry.

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

• noun a strong emotion; a feeling that is oriented toward some real or supposed grievance
• verb become angry
• noun the state of being angry
• noun belligerence aroused by a real or supposed wrong (personified as one of the deadly sins)
• verb make angry