"detection" in the noun sense
1. detection, sensing
the perception that something has occurred or some state exists
"early detection can often lead to a cure"
2. detection, catching, espial, spying, spotting
the act of detecting something catching sight of something
3. signal detection, detection
the detection that a signal is being received
4. detection, detecting, detective work, sleuthing
a police investigation to determine the perpetrator
"detection is hard on the feet"
Source: WordNet® (An amazing lexical database of English)
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