nonstandard

Definitions of nonstandard
1

adj varying from or not adhering to a standard

nonstandard windows”
“envelopes of nonstandard sizes”
nonstandard lengths of board”
Synonyms:
deficient, inferior, substandard
falling short of some prescribed norm
nonnormative
not based on a norm
Antonyms:
standard
conforming to or constituting a standard of measurement or value; or of the usual or regularized or accepted kind
normal
conforming with or constituting a norm or standard or level or type or social norm; not abnormal
modular
constructed with standardized units or dimensions allowing flexibility and variety in use
regular
conforming to a standard or pattern
regulation
prescribed by or according to regulation
standardised, standardized
brought into conformity with a standard
stock
routine
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adj not standard; not accepted as a model of excellence

“a nonstandard text”
Antonyms:
standard
established or well-known or widely recognized as a model of authority or excellence
orthodox
adhering to what is commonly accepted
authoritative, classic, classical, definitive
of recognized authority or excellence
basic, canonic, canonical
reduced to the simplest and most significant form possible without loss of generality
casebook, textbook
according to or characteristic of a casebook or textbook; typical
criterial, criterional
serving as a basis for evaluation
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adj 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
nonstandard
unacceptable, unaccepted
not conforming to standard usage
Antonyms:
received, standard
conforming to the established language usage of educated native speakers
acceptable
judged to be in conformity with approved usage
classical
(language) having the form used by ancient standard authors
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