The symmetry that a figure has if it can be made to fit exactly onto the original when it is translated a given distance at a given direction and then reflected over a line. As in translational symmetry, glide-reflectional symmetry exists only for infinite patterns.
literature noun [U] (WRITING). B1 written âartistic âworks, âespecially those with a high and âlasting âartistic âvalue: âclassical/âmodern literature Wuthering Heights is a âclassic of âEnglish literature. More examples. 1  He's very â knowledgeable about â German literature.
Definitions of literature have varied over time: it is a culturally relative definition. In Western Europe prior to the 18th century, literature denoted all books and writing. A more restricted sense of the term emerged during the Romantic period, in which it began to demarcate imaginative writing.