nonstandard has definitions from the field of linguistics
1
[ adjective ] varying from or not adhering to a standard

Examples

"nonstandard windows" "envelopes of nonstandard sizes" "nonstandard lengths of board"

2
[ adjective ] (linguistics) not conforming to the language usage of a prestige group within a community

Examples

"a nonstandard dialect is one used by uneducated speakers or socially disfavored groups" "the common core of nonstandard words and phrases in folk speech"- Dunlap

3
[ adjective ] not standard; not accepted as a model of excellence

Examples

"a nonstandard text"

Related terms

standard

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