surveillance /sɚˈveɪləns/ noun Learner's definition of SURVEILLANCE
[noncount]
: the act of carefully watching someone or something especially in order to prevent or detect a crime監視 -
government surveillance of suspected terrorists政府對可疑恐怖分子的監視
-
The bank robbery was recorded by surveillance video cameras.銀行劫案被監控錄像機拍了下來。
-
electronic surveillance [=the act of using electronic devices to watch people or things]電子監控
-
The police kept her under surveillance. [=watched her closely]警方在嚴密監視她。