| word | surveillance |
|---|---|
| definition | noun Surveillance is the careful watching of someone, especially by an organization such as the police or the army . He was arrested after being kept under constant surveillance. Police swooped on the home after a two-week surveillance operation. Police keep track of the kidnapper using electronic surveillance equipment. |
| cefr-level | C1 |
Tags: oxford5k::cefr-level:c1
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