Contrary to reason; lacking an appropriate or sufficient reason; irrational. / Lacking the ability to reason.

Not singular. / (information theory) Injective.

Alternative spelling of nondisclosure.

Not negotiable; not subject to negotiation.

Not pertaining to or obtained via a bonus.

Not subject to regulation.

Not relative.

A person who is not a relative.

That cannot be eaten; not edible

Not binary. / Having or pertaining to a gender identity not represented by the gender binary; not exclusively male or female; genderqueer.