occurring in the same period of time; "a rise in interest rates is often contemporaneous with an increase in inflation"; "the composer Salieri was contemporary with Mozart"
If two events or situations are contemporaneous, they happen or exist during the same period of time. the contemporaneous development of a separate and quite recognisable Scottish school of art. happening or done in the same period of time = contemporary contemporaneous with (contemporaneus, from com- ( COM-) + tempus )