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Pronunciation:  `iri'teyshun

WordNet Dictionary
  1. [n]  the act of troubling or annoying someone
  2. [n]  unfriendly behavior that causes anger or resentment
  3. [n]  an uncomfortable feeling in some part of the body
  4. [n]  a sudden outburst of anger; "his temper sparked like damp firewood"
  5. [n]  the neural or electrical arousal of an organ or muscle or gland
  6. [n]  the psychological state of being irritated or annoyed
  7. [n]  (pathology) abnormal sensitivity to stimulation; "any food produced irritation of the stomach"

IRRITATION is a 10 letter word that starts with I.


 Synonyms: aggravation, annoyance, annoyance, annoying, botheration, discomfort, excitation, innervation, pique, provocation, soreness, temper, vexation, vexation
 See Also: abnormal condition, abnormalcy, abnormality, aggression, aggro, annoyance, arousal, bummer, chafe, exasperation, huff, hurt, impatience, last straw, mental state, miff, mistreatment, pinprick, psychological state, red flag, restlessness, seeing red, sensitisation, sensitization, snit, suffering, taunt, taunting, twit, vexation



Webster's 1913 Dictionary
\Ir`ri*ta"tion\, n. [L. irritatio: cf. F.
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.

Medical Dictionary
 Definition: Irritation of a nerve root is the intermittent mild pressure which gives rise to symptoms but no loss of function.
Thesaurus Terms
 Related Terms: adverse circumstances, adversity, affliction, aggravation, agitation, algesia, amplification, animation, annoyance, arousal, arousing, augmentation, blight, bummer, care, chafe, contentiousness, cross, curse, deepening, deliberate aggravation, deterioration, difficulties, difficulty, disapprobation, disapproval, discontent, displeasure, dissatisfaction, downer, electrification, embittering, embitterment, enhancement, enlargement, exacerbation, exasperation, excitation, excitement, exhilaration, festering, firing, fomentation, fret, gall, galvanization, hard knocks, hard life, hard lot, hardcase, hardship, heightening, incitation, incitement, increase, inflammation, infuriation, instigation, intensification, irritant, lathering up, magnification, pep rally, pep talk, perturbation, plight, predicament, pressure, provocation, rabble-rousing, rankling, resentfulness, resentment, rigor, sea of troubles, sensitiveness, sharpening, sore, sore spot, soreness, souring, steaming up, stimulation, stimulus, stirring, stirring up, stirring-up, stress, stress of life, tenderness, trial, tribulation, trouble, troubles, vale of tears, vexation, vicissitude, whipping up, working up, worsening