1. [ adjective ] varying from or not adhering to a standard

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

Related terms: standard deficient nonnormative measure measure
2. [ adjective ] (linguistics) 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"- Dunlap

Related terms: standard linguistics unacceptable bad
3. [ adjective ] not standard; not accepted as a model of excellence

"a nonstandard text"

Related terms: standard
Similar spelling:   nonstarter