ir·ri·ta·tion /ˌɪrəˈteʃən/ 名詞
1. The act of irritating, or exciting, or the state of being irritated; excitement; stimulation, usually of an undue and uncomfortable kind; especially, excitement of anger or passion; provocation; annoyance; anger.
The whole body of the arts and sciences composes one vast machinery for the irritation and development of the human intellect. --De Quincey.
2. Physiol. The act of exciting, or the condition of being excited to action, by stimulation; -- as, the condition of an organ of sense, when its nerve is affected by some external body; esp., the act of exciting muscle fibers to contraction, by artificial stimulation; as, the irritation of a motor nerve by electricity; also, the condition of a muscle and nerve, under such stimulation.
3. Med. A condition of morbid excitability or oversensitiveness of an organ or part of the body; a state in which the application of ordinary stimuli produces pain or excessive or vitiated action.
n 1: the psychological state of being irritated or annoyed [syn:
annoyance, vexation, botheration]
2: a sudden outburst of anger; "his temper sparked like damp
firewood" [syn: pique, temper]
3: (pathology) abnormal sensitivity to stimulation; "any food
produced irritation of the stomach"
4: the neural or electrical arousal of an organ or muscle or
gland [syn: excitation, innervation]
5: an uncomfortable feeling in some part of the body [syn: discomfort,
6: unfriendly behavior that causes anger or resentment [syn: aggravation,
7: the act of troubling or annoying someone [syn: annoyance,