Activity Word Meaning

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

the condition in which things are happening or being done

condition in which things happen

• there has been a sustained level of activity in the economy
• the only sign of human activity now is the boatload of day trippers from the mainland

a thing that a person or group does or has done

thing done

• 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.

thermodynamic quantity