abnormity
n.n. something that is not normal or follows the usual rules. It is an old word for an unusual or strange situation.
n. a state or condition that deviates from what is usual, normal, or expected. Archaic in modern usage; typically found in historical or legal contexts.
The sudden change in weather was a great abnormity.
The judge noted that the defendant's behavior was an abnormity that required further psychological evaluation.
In the rigid social hierarchy of the period, any deviation from established customs was viewed as a dangerous abnormity that threatened the stability of the entire community.
From abnorm(al) + -ity, from Late Latin abnormitas, from Latin abnormis (“irregular, abnormal”), from ab + norm (“rule, pattern”). See also abnormous.