n.
The use of two markedly different varieties of a language in different social situations, such as a formal variety at work and an informal variety at home.
[From Greek diglōssos, speaking two languages : di-, two; see di-1 + glōssa, tongue, language.]
diglossic di·glos'sic adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
