ac|tiv|i|ty
W1S1 [ækˈtıvıti] n plural activities
1.) [C usually plural]
something that you do because you enjoy it
leisure/recreation/outdoor/cultural etc activities
▪ outdoor activities such as hiking or climbing
2.) [U and C]
things that people do in order to achieve a particular aim
political/economic/business etc activity
▪ Everyone is free to engage in peaceful political activity.
criminal/terrorist/illegal etc activity
▪ fund-raising activities
3.) [U]
a situation in which a lot of things are happening or a lot of things are being done
▪ the noise and activity of the city
▪ There's an amazing level of activity in the town centre currently.
physical/mental activity
▪ Regular physical activity helps to control your weight.
Dictionary of contemporary English. 2013.