'nonstandard' definitions:

Definition of 'nonstandard'

(from WordNet)
adjective
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 [ant: received, standard]
adjective
Varying from or not adhering to a standard; "nonstandard windows"; "envelopes of nonstandard sizes"; "nonstandard lengths of board" [ant: standard]
adjective
Not standard; not accepted as a model of excellence; "a nonstandard text" [ant: standard]

Definition of 'nonstandard'

From: GCIDE
  • 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]