n. (pl. -ies)
1 an expression of meaning, often humorous or sarcastic, by the use of language of a different or opposite tendency.
2 an ill-timed or perverse arrival of an event or circumstance that is in itself desirable.
3 the use of language with one meaning for a privileged audience and another for those addressed or concerned.
Etymology: L ironia f. Gk eironeia simulated ignorance f. eiron dissembler
2.
adj. of or like iron.
Useful english dictionary. 2012.