Detection is the act of noticing or discovering something. At the airport, you might see German Shepherds trained in the detection of drug smuggling or explosives in luggage.

Detection, detect, detective, detector — all are about noticing and discovering. A detective looks for clues that lead to the detection of the person who committed a crime. A metal detector is a machine created for the detection of coins people have left behind on the beach. Some teachers seem to have a third eye they use primarily for the detection of kids passing notes, or checking their cell phones during class.

Definitions of detection

n the perception that something has occurred or some state exists

“early detection can often lead to a cure”
Type of:
the process of perceiving

n the act of detecting something; catching sight of something

catching, espial, spotting, spying
Type of:
discovery, find, uncovering
the act of discovering something

n the detection that a signal is being received

signal detection
Type of:
quality or fidelity of a received broadcast

n a police investigation to determine the perpetrator

detection is hard on the feet”
detecting, detective work, sleuthing
Type of:
police investigation, police work
the investigation of criminal activities

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