Definition of “activity” - English Dictionary

“activity” in British English

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activitynoun

uk /ækˈtɪv.ə.ti/ us /ækˈtɪv.ə.t̬i/

activity noun (MOVEMENT)

B2 [ U ] the situation in which a lot of things are happening or people are moving around:

There was a lot of activity in preparation for the Queen's visit.
Economists are concerned by the low level of economic activity.
There was a sudden flurry of activity when the director walked in.

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activity noun (ENJOYMENT)

A2 [ C usually plural ] something that is done for enjoyment, especially an organized event:

His spare-time activities include cooking, tennis, and windsurfing.
We offer our guests a wide range of outdoor/sporting activities.

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(Definition of “activity” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“activity” in American English

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activitynoun [ C/U ]

us /ækˈtɪv·ɪ·t̬i/

the doing of something, or something that you are doing, have done, or could do:

[ C ] There were lots of activities for children at the museum.
[ C ] Her favorite activity is visiting antique shops.
[ U ] Carbon dioxide is also produced by human activity.

(Definition of “activity” from the Cambridge Academic Content Dictionary © Cambridge University Press)

“activity” in Business English

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activitynoun

uk /ækˈtɪvəti/ us

[ U ] a situation in which a lot of things are happening or being done:

business/commercial/economic activity Any conflict has the potential to disrupt business activity.
boost/increase activity This package of tax cuts and spending increases is designed to boost economic activity over the next year.
The increased level of activity in our principal markets flattened out during the first half of this year.

[ C, usually singular ] the work of a person, group, or organization to achieve something, especially to make money:

The company's activities stretch from Australia to the US.
We invest primarily in companies which have their principal business activities in the Pacific Basin.

(Definition of “activity” from the Cambridge Business English Dictionary © Cambridge University Press)