Definition of emeritus adjective from the Oxford Advanced Learner's Dictionary

 

emeritus

 adjective
adjective
BrE BrE//iˈmerɪtəs//
 
; NAmE NAmE//iˈmerɪtəs//
 
(also Emeritus)
 
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used with a title to show that a person, usually a university teacher, keeps the title as an honour, although he or she has stopped working the Emeritus Professor of Biology In North American English the form Emerita /imerɪtə/ is used for women:Professor Emerita Mary Judd Word Origin mid 18th cent.: from Latin, past participle of emereri ‘earn one's discharge by service’, from e- (variant of ex-) ‘out of, from’ + mereri ‘earn’.
See the Oxford Advanced American Dictionary entry: emeritus