American Heritage Dictionary
(2)
Century Dictionary
(1)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
Now consider non-financial applications such as those based on automatic number plate recognition (ANPR), surveillance, GPS, RFID or other sensor data.— Independent Information Technology and business analysis from IT-Director.com
Reports of this surveillance were sent to at least seven federal, state, and local law enforcement agencies, including the National Security Agency, Baltimore City, Baltimore County, and Anne Arundel County police departments, and the state General Services Police.— AfterDowningStreet.org - Bush-Cheney Trials in '09
He called the surveillance program "one of the great success stories of the intelligence business in the last century."— Top Stories - Google News
Its three main activities -- surveillance, technical assistance and lending -- are intended to meet these goals.— IdahoStatesman.com News Updates
National Geospatial-Intelligence Agency are sponsoring an annual demonstration called Empire Challenge, which "seeks to improve interoperability of intelligence, surveillance, and reconnaissance activities" among end users.— CNET News.com

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word a few times a week.
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