Chau·cer 
(chô
s
ər),
Geoffrey 1340?-1400.
English poet whose writing presents a richly varied picture of life and values in late-medieval England. His works include The Book of the Duchess (c. 1370), Troilus and Criseyde (c.1385), and his masterpiece, the unfinished Canterbury Tales (c. 1385-c. 1400).
Chau·ceri·an (chô-sîrē-ən) adj. & n.

Geoffrey Chaucerportrait from a 15th-century manuscript