[ uhn-kuh n-ven-shuh-nal-i-tee ]
/ ˌʌn kənˌvɛn ʃəˈnæl ɪ ti /

noun, plural un·con·ven·tion·al·i·ties for 2.

disregard for convention; the state or quality of being inconsistent with customs, rules, etc.; originality.
something unconventional, as an act.

Origin of unconventionality

First recorded in 1850–55; un-1 + conventionality
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unconventionality