from
The Collaborative International Dictionary of English v.0.48
nonstandard \nonstandard\, non-standard \non-standard\adj.
1. 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}. [Narrower terms: {deficient, inferior,
substandard}]
Syn: nonstandard.
[WordNet 1.5]
2. (Linguistics) 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}.
[WordNet 1.5]