The Meaning of nonstandard

• (adjective) not standard; not accepted as a model of excellence; "a nonstandard text"
• (adjective) varying from or not adhering to a standard; "nonstandard windows"; "envelopes of nonstandard sizes"; "nonstandard lengths of board"
• (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

Synonyms

bad , unacceptable , unaccepted

Antonyms

casebook , canonical , criterial , modular , standardised , authoritative , acceptable , stock , definitive , regular , received , classical , textbook , regulation , classic , standard , criterional , basic , standardized , canonic

Rhymes

gerrymandered , glandered , meandered , pandered , slandered , standard , substandard