What is the meaning of irritating?

verb

• Cause annoyance in; disturb, especially by minor irritations.
  • usage: "Mosquitoes buzzing in my ear really bothers me"; "It irritates me that she never closes the door after she leaves"
  • synonyms: annoy, rag, get to, bother, get at, irritate, rile, nark, nettle, gravel, vex, chafe, devil
• Excite to an abnormal condition, or chafe or inflame.
  • usage: "Aspirin irritates my stomach"
  • synonyms: irritate
• Excite to some characteristic action or condition, such as motion, contraction, or nervous impulse, by the application of a stimulus.
  • usage: "irritate the glands of a leaf"
  • synonyms: irritate

adjective

• Causing irritation or annoyance.
  • usage: "tapping an annoying rhythm on his glass with his fork"; "aircraft noise is particularly bothersome near the airport"; "found it galling to have to ask permission"; "an irritating delay"; "nettlesome paperwork"; "a pesky mosquito"; "swarms of pestering gnats"; "a plaguey newfangled safety catch"; "a teasing and persistent thought annoyed him"; "a vexatious child"; "it is vexing to have to admit you are wrong"
  • synonyms: annoying, bothersome, galling, nettlesome, pesky, pestering, pestiferous, plaguy, plaguey, teasing, vexatious, vexing
• Used of physical stimuli. ( serving to stimulate or excite)
  • usage: "an irritative agent"
  • synonyms: irritative
• Causing physical discomfort.
  • usage: "bites of black flies are more than irritating; they can be very painful"
  • synonyms: painful