This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Close observation of a person or group, especially one under suspicion.

n. The act of observing or the condition of being observed.

n. Close observation of an individual or group; person or persons under suspicion.

n. Continuous monitoring of disease occurrence for example.

n. Systematic observation of places and people by visual, aural, electronic, photographic or other means.

n. In criminal law, an investigation process by which police gather evidence about crimes, or suspected crime, through continued observation of persons or places.

n. Oversight; watch; inspection; supervision.

n. Oversight; superintendence; supervision; watch; spying.

n. close observation of a person or group (usually by the police)

"Google acted over dissident fears - Google realised dissidents were at risk from attempts to use company's technology for surveillance, say sources Google moved quickly to announce that it would stop censoring its Chinese ­service after realising dissidents were at risk from attempts to use the company's technology for political ­surveillance, according to a source with direct ­ ..."

police investigation    police work   

observation    wiretapping    shadowing    tailing   

survey    surveil   

electronic surveillance    stakeout    watch    vigil    surveillance of disease   

uberveillance   

oversight    watch    inspection    supervision   

Valence    valence   

reconnaissance    monitor    radar    scan    detection    inspection    maintenance    communication    patrol    survey