Longman Dictionary of Contemporary English homepage

detection

 noun
     
de‧tec‧tion [uncountable]
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.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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