DETECTION

detection, catching, espial, spying, spotting

(noun) the act of detecting something; catching sight of something

detection, detecting, detective work, sleuthing

(noun) a police investigation to determine the perpetrator; “detection is hard on the feet”

detection, sensing

(noun) the perception that something has occurred or some state exists; “early detection can often lead to a cure”

Source: WordNet® 3.1

Noun

detection (countable and uncountable, plural detections)

The act of detecting or sensing something; discovering something that was hidden or disguised.

The finding out of a constituent, a signal, an agent or the like, mostly by means of a specific device or method.

Source: Wiktionary

De*tec"tion, n. Etym: [L. detectio an uncovering, revealing.]

Definition: The act of detecting; the laying open what was concealed or hidden; discovery; as, the detection of a thief; the detection of fraud, forgery, or a plot. Such secrets of guilt are never from detection. D. Webster.

Source: Webster’s Unabridged Dictionary 1913 Edition