The meaning of UNCONVENTIONAL isnot conventional: not bound by or in accordance with convention : being out of the ordinary. How to use unconventional in a sentence.
It is capable of producing highlyunconventionaldesigns that are perfectly rational, and often better adapted to their purpose than the conventional solution.

This particular example perfectly highlights why Unconventional Penthouse Apartment Living Space is so captivating.
unconventional(ˌʌnkənˈvɛnʃənəl) adj not conforming to accepted rules or standards ˌunconˌventionˈality n

Definition ofunconventionaladjective from the Oxford Advanced Learner's Dictionary. not following what is done or considered normal or acceptable by most people; different and interesting synonym unorthodox. The magazine describes him as havingunconventionalgood looks.

UnconventionalDiner serves inspired dishes that blend soulful comfort with haute technique. Chef David Deshaies' menu is studded with imaginative delights that echo the restaurant’s name, from blueberry-lavender pancakes to pot-pie poppers to a meatloaf that’s “nothing like anyone’s mom’s.”
UnconventionalAI is rethinking the foundations of a computer to optimize energy efficiency for AI. Founded by experts in AI systems, analog circuits, computing theory, and neuroscience, we are bringing biology-scale efficiency to artificial intelligence.
To beunconventionalis to act, dress, speak, or otherwise exist out of the bounds of cultural norms. If you eat cheeseburgers for breakfast, that's somewhatunconventional. Anything that's nonconformist or out of the ordinary can be described asunconventional.