- IPA (key): /ækˈtɪ.vɪ.ti/ or /ækˈtɪ.vɪ.tiː/ or /ækˈtɪ.və.ti/
- (uncountable) When a person or animal has activity, it is active or lively.
- The sleeping dog did not show much activity.
- (countable) When you have a function to do, you have an activity.
- The child has many after-school activities.
- She participates in women's rights activities.