1.
Detection is the act of noticing or sensing something.
...the early ~ of breast cancer.
N-UNCOUNT: oft N of n
2.
Detection is the discovery of something which is supposed to be hidden.
They are cheating but are sophisticated enough to avoid ~.
N-UNCOUNT: oft N of n
3.
Detection is the work of investigating a crime in order to find out what has happened and who committed it.
The ~ rate for motor vehicle theft that year was just 11.7 per cent...
N-UNCOUNT