surveillance
Word family verbsurveilnounsurveillantsurveillance
sur·veil·lance /səˈveɪləns $ sər-/ noun [uncountableU] 1 WATCHwhen the police, army etc watch a person or place carefully because they may be connected with criminal activities 〔对可疑的人或场所的〕监视,盯梢surveillance of 24-hour surveillance of the building 对大楼的 24 小时监视
under surveillance They were under constant close surveillance day and night. 他们日夜不间断地受到严密监视。
The suspects were kept under surveillance. 嫌疑犯受到监视。
electronic surveillance equipment 电子监控设备
2 when one country watches the military activities of another country to see what they are planning to do 监视,侦察〔指一个国家监视另一个国家的军事行动来判断其动向〕 a surveillance mission 侦察任务
surveillance aircraft 侦察机
kept under surveillance• The suspects were kept under surveillance. Origin surveillance (1800-1900) French surveiller “to watch over”, from
sur- (
→ SURCHARGE) +
veiller “to watch” (from
Latin vigil;
→ VIGIL)