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

 

contemporaneous

 adjective
adjective
BrE BrE//kənˌtempəˈreɪniəs//
 
; NAmE NAmE//kənˌtempəˈreɪniəs//
 
 
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contemporaneous (with somebody/something) (formal) happening or existing at the same time synonym contemporary How do we know that the signature is contemporaneous with the document? contemporaneous events/accounts Word Origin mid 17th cent.: from Latin, from con- ‘together with’ + temporaneus (from tempus, tempor- ‘time’) + -ous.
See the Oxford Advanced American Dictionary entry: contemporaneous