also nonstandard, "not average or usual," 1926, from non- + standard. A linguist's value-neutral term for language that is not of the form that is accepted as standard, which was formerly stigmatized as bad or vulgar.
non-returnable
non-sectarian
nonsense
nonsensical
non-smoker
non-standard
non-starter
non-stop
nonsuch
non-toxic
non-vascular