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nonstandard

1 ENTRIES FOUND:
nonstandard /ˌnɑːnˈstændɚd/ adjective
nonstandard
/ˌnɑːnˈstændɚd/
adjective
Britannica Dictionary definition of NONSTANDARD
: not accepted or used by most of the educated speakers and writers of a language
: not the usual size or kind
opposite standard; compare substandard