(1):
(a.) Resembling iron taste, hardness, or other physical property.
(2):
(n.) A sort of humor, ridicule, or light sarcasm, which adopts a mode of speech the meaning of which is contrary to the literal sense of the words.
(3):
(a.) Made or consisting of iron; partaking of iron; iron; as, irony chains; irony particles.
(4):
(n.) Dissimulation; ignorance feigned for the purpose of confounding or provoking an antagonist.