| 1. | the widespread existence within a society of sharply divergent formal and informal varieties of a language each used in different social contexts or for performing different functions, as the existence of Katharevusa and Demotic in modern Greece. |
| 2. | Pathology. the presence of two tongues or of a single tongue divided into two parts by a cleft. |
diglossia di·glos·si·a (dī-glŏs'ē-ə)
n.
See bifid tongue.