1. Varying from or not adhering to the standard: nonstandard lengths of board.
2. Linguistics Associated with a language variety used by uneducated speakers or socially disfavored groups.
Usage Note: The term nonstandard was introduced by linguists and lexicographers to describe usages and language varieties that had previously been labeled with terms such as vulgar and illiterate. Nonstandard is not a euphemism but reflects the empirical discovery that the varieties used by low-prestige groups have rich and systematic grammatical structures and that their stigmatization more often reflects a judgment about their speakers rather than any inherent deficiencies in logic or expressive power. Note that the use of nonstandard forms is not necessarily restricted to the communities with which they are associated in the public mind. Many educated speakers freely use forms such as can't hardly or ain't I to set a popular or informal tone. · Some dictionaries use the term substandard to describe forms, such as ain't, associated with uneducated speech, while reserving nonstandard for forms such as irregardless, which are common in writing but are still regarded by many as uneducated. But substandard is often viewed as needlessly or unfairly judgmental, and most linguists and lexicographers now use only nonstandard.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.