definition of
detection

[1] #1 detection n. [sensing] the perception that something has occurred or some state exists; "early detection can often lead to a cure". wn

[2] #2 detection n. [catching, espial, spying, spotting] the act of detecting something; catching sight of something. wn

[3] #3 detection n. [signal detection] the detection that a signal is being received. wn

[4] #4 detection n. [detecting, detective work, sleuthing] a police investigation to determine the perpetrator; "detection is hard on the feet". wn