Meaning of "activity" in Essential American English Dictionary

activity

noun us /ækˈtɪv·ə·t̬i/

A2 (plural activities) something that you do, especially for enjoyment:

Activities on offer include swimming and tennis.
We enjoy outdoor activities like hiking and fishing.

[ no plural ] the actions of people when they are moving around and doing things:

There was no sign of activity outside.

(Definition of “activity” from the Webster's Essential Mini Dictionary © Cambridge University Press)