Detection (noun)

1. The action or process of detecting something or discovering its presence.
2. The discovery of the presence of something (especially something undesirable or illegal).
3. The identification of the presence or existence of a particular substance or organism.
4. The recognition or discovery of something by means of evidence or signs.

Origin:

Late 16th century: from french détection, from detecter 'uncover, discover' (see detect).

Examples:

1. The detection of the disease was possible thanks to the new diagnostic technique.
2. The detection of the spy network was a major victory for the intelligence agencies.
3. The detection of the missing person was the result of a massive search operation.
4. The detection of the meteorite impact was made by the satellite observation.
5. The detection of the criminal was the result of a long investigation.