C1nounformal10K+

UK/["/sɜːˈveɪləns/"]/US/["/sɜːrˈveɪləns/"]/

Meaning of Surveillance

In simple words: Watching someone or something carefully, often to find out more information.

Surveillance in a sentence

  • The police are keeping the suspects **under** constant **surveillance**.
  • **surveillance cameras/equipment**
  • The suspects are under police surveillance.
  • The images were covertly captured on surveillance tape.

How to use Surveillance

Used mainly in formal contexts such as law enforcement, security, and privacy discussions. Not appropriate in casual conversation. Can imply a sense of monitoring or intrusiveness.

Grammar pattern

surveillance + object

Memory hint

Sounds like 'serve a lance' — imagine serving someone while watching them closely.

Related words

Collocations with Surveillance

Synonyms for Surveillance

Opposites of Surveillance

Common mistakes with Surveillance

  • Confused with 'surveil' (verb) and 'surveillance' (noun)
  • Mispronunciation, often as 'sur-veal-lance' instead of 'sur-veil-lance'
  • Overusing in informal settings where more casual terms could fit

Surveillance appears in

Surveillance in other languages

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Frequently asked questions about Surveillance

What does Surveillance mean?

Watching someone or something carefully, often to find out more information.

What is the definition of Surveillance?

the act of carefully watching a person suspected of a crime or a place where a crime may be committed

How do you use Surveillance in a sentence?

The police are keeping the suspects **under** constant **surveillance**.

Can you give another example of Surveillance?

**surveillance cameras/equipment**

What are synonyms for Surveillance?

Common alternatives include observation.

What is the opposite of Surveillance?

Opposite meanings include ignorance, negligence, carelessness.

What words go with Surveillance?

It commonly pairs with close, constant, regular, be under, keep somebody/​something under, place somebody/​something under, camera, device, equipment.

What are common mistakes when using Surveillance?

Confused with 'surveil' (verb) and 'surveillance' (noun) Mispronunciation, often as 'sur-veal-lance' instead of 'sur-veil-lance' Overusing in informal settings where more casual terms could fit

How do you pronounce Surveillance?

US: /["/sɜːrˈveɪləns/"]/, UK: /["/sɜːˈveɪləns/"]/. Listen to the audio above to hear native pronunciation.

Is Surveillance formal or informal?

"Surveillance" is formal, so it fits professional, business, or academic conversations.

When should I use Surveillance?

Used mainly in formal contexts such as law enforcement, security, and privacy discussions. Not appropriate in casual conversation. Can imply a sense of monitoring or intrusiveness.

What CEFR level is Surveillance?

"Surveillance" is at C1 level on the CEFR scale.