surveillance
noun(sur-veil-lance)
close watch kept over someone or something (as by a detective); also : supervision
surveillance
noun(sur-veil-lance)
the act of using electronic devices to watch people or things
surveillance
idiom(sur-veil-lance)
to watch (someone or something) closely especially in order to prevent or detect a crime
surveillance
noun(sur-veil-lance)
methods and devices used for detecting or thwarting surveillance —often used before another noun