Longman Dictionary of Contemporary English - activity

~ S1 W1 n 1 a situation in which a lot of things are happening or people are doing things, moving around etc  (I missed the noise and activity of the city. | a huge amount of media activity during the elections)  (- opposite inactivity) 2 something that you do for interest or pleasure or because you want to achieve something  (leisure activities | There'll be plenty of activities laid on for the kids. | terrorist activities)