surveillance

noun
sur*veil*lance \ sər-ˈvā-lən(t)s \ -ˈvāl-yən(t)s \ -ˈvā-ən(t)s \
1802
  • close watch kept over someone or something (as by a detective); also : supervision

immune surveillance

noun
immune surveillance \
1965
  • the monitoring process by which cells of the immune system (such as natural killer cells, cytotoxic T cells, or macrophages) detect and destroy premalignant or malignant cells in the body; broadly : any monitoring process of the immune system that detects and destroys foreign substances, cells, or tissues

electronic surveillance

noun
electronic surveillance \
  • the act of using electronic devices to watch people or things

keep under surveillance

idiom
keep under surveillance \
  • to watch (someone or something) closely especially in order to prevent or detect a crime

countersurveillance

noun
coun*ter*sur*veil*lance \ ˌkau̇n-tər-sər-ˈvā-lən(t)s \ -ˈvāl-yən(t)s \ -ˈvā-ən(t)s \
1959
  • methods and devices used for detecting or thwarting surveillance —often used before another noun
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