Meaning of ACTIVITY in English

ACTIVITY

/ ækˈtɪvəti; NAmE / noun ( pl. -ies )

1.

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

economic activity

The streets were noisy and full of activity.

Muscles contract and relax during physical activity.

—compare inactivity

2.

[ C , usually pl. ] a thing that you do for interest or pleasure, or in order to achieve a particular aim :

leisure / outdoor / classroom activities

The club provides a wide variety of activities including tennis, swimming and squash.

illegal / criminal activities

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WORD ORIGIN

late Middle English : from French activité or late Latin activitas , from Latin act- done, from the verb agere .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.