It is primarily defined that way only if your dictionary is:
a) an antique
or
b) a specialised dictionary for students of pre-20th century literature
or
c) shit.
EDIT: wiktionary gives the modern meaning as arising in the 18th century. Its only clear post-1875 citation for the older meaning is a 1972 book about the 17th century, discussing 17th century attitudes, and may well be ironically borrowing the lexis of the period. [the other quotation, from 2015, is ambiguous, as 'enormity of his crimes' may, and IMO probably does, refer to the magnitude of the crime just as much as its unnaturalness].
[fun fact: apparently I pronounce it 'wrong'. I pronounce the initial vowel as schwa, but wiktionary says it should be unstressed /I/...]