de ‧ tec ‧ tion AC /dɪˈtekʃ ə n/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ detection , ↑ detective ; verb : ↑ detect ; adjective : ↑ detectable ≠ INDETECTIBLE ]
when something is found that is not easy to see, hear etc, or the process of looking for it
detection of
Early detection of the disease is vital.
escape/avoid detection
By flying low, the plane avoided detection by enemy radar.