[akˈtɪvɪti], (Noun)

Definitions:
- the condition in which things are happening or being done
(e.g: there has been a sustained level of activity in the economy)

- a thing that a person or group does or has done
(e.g: the firm's marketing activities)

- a thermodynamic quantity representing the effective concentration of a particular component in a solution or other system, equal to its concentration multiplied by an activity coefficient


Phrases:

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