nonstandard (Adjective) — (linguistics) not conforming to the language usage of a prestige group within a community. ex. "a nonstandard dialect is one used by uneducated speakers or socially disfavoured groups" ex. "the common core of nonstandard words and phrases in folk speech"
nonstandard (Adjective) — Varying from or not adhering to a standard. ex. "nonstandard windows" ex. "envelopes of nonstandard sizes" ex. "nonstandard lengths of board"
nonstandard (Adjective) — Not standard; not accepted as a model of excellence. ex. "a nonstandard text"