surveillance

Noun
  1. Close observation of a person or group (usually by the police) (synset 100653709)
    is a type of: police investigation, police work - the investigation of criminal activities
    subtypes:
    • electronic surveillance - surveillance by electronic means (e.g. television)
    • vigil, watch - a purposeful surveillance to guard or observe
    • stakeout - surveillance of some place or some person by the police (as in anticipation of a crime)
    • surveillance of disease - the ongoing systematic collection and analysis of data about an infectious disease that can lead to action being taken to control or prevent the disease

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