[ˌɪrɪˈteɪʃn], (Noun)

Definitions:
- the state of feeling annoyed, impatient, or slightly angry
(e.g: much to my irritation, Chris fell asleep)

- inflammation or other discomfort in a body part caused by reaction to an irritant substance
(e.g: some chemicals cause a direct irritation to the skin leading to dermatitis)


Phrases:

Origin:
late Middle English: from Latin irritatio(n-), from the verb irritare (see irritate)