/ kənˌtempəˈreɪniəs; NAmE / adjective
contemporaneous (with sb/sth) ( formal ) happening or existing at the same time
SYN contemporary :
How do we know that the signature is contemporaneous with the document?
contemporaneous events / accounts
► con·tem·por·an·eous·ly adverb
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WORD ORIGIN
mid 17th cent.: from Latin , from con- together with + temporaneus (from tempus , tempor- time) + -ous .