Definitions for "nonstandard"
Not conforming to the language usage of a prestige group within a community; as, a nonstandard dialect is one used by uneducated speakers or socially disfavored groups. Opposite of standard.
Speech forms that are common in colloquial writing but that should be avoided in college and business writing.
not conforming to the language usage of a prestige group within a community; "a nonstandard dialect is one used by uneducated speakers or socially disfavored groups"; "the common core of nonstandard words and phrases in folk speech"- A.R.Dunlap
Keywords:  handspans, paces, metric, clips, sticks
any units of measure which are not part of the measures metric or English measurement systems; examples: paces, handspans, sticks, paper clips.
varying from or not adhering to a standard; as, nonstandard windows; envelopes of nonstandard sizes; non-standard lengths of board cost more per foot. Opposite of standard.
not standard; not accepted as a model of excellence; "a nonstandard text"