#1 detection n. [sensing] the perception that something has occurred or some state exists; "early detection can often lead to a cure". wn
#2 detection n. [catching, espial, spying, spotting] the act of detecting something; catching sight of something. wn
#3 detection n. [signal detection] the detection that a signal is being received. wn
#4 detection n. [detecting, detective work, sleuthing] a police investigation to determine the perpetrator; "detection is hard on the feet". wn
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