activity

Noun

activity (countable and uncountable, plural activities)

1. (uncountable) The state or quality of being active; activeness.
   • Pit row was abuzz with activity.
   • For quotations using this term, see Citations:activity.
2. (countable) Something done as an action or a movement.
   • There has been a controversy in this sphere between economic materialism and the version of Marxism which ascribes an active and independent historical function to 'subjective' factors, i.e. the workings of the intellect and freely directed political activity.1978 [1976], Leszek Kołakowski, translated by P[aul] S[teven] Falla, Main Currents of Marxism, volume I: The Founders, Oxford: Clarendon Press, translation of Główne nurty marksizmu: powstanie (in...
   • The activity for the morning was a walk to the store.

   Synonyms:

   pursuit, undertaking

3. (countable) Something done for pleasure or entertainment, especially one involving movement or an excursion.
   • An increasing number of sports activities are on offer at the university.
   • Quilting can be an enjoyable activity.
4. The lexical aspect (aktionsart) of verbs or predicates that change over time and have no natural end point.
   • […]distinctions among states of affairs are reflected to a striking degree in distinctions among Aktionsart types. That is, situations are expressed by state verbs or predicates, events by achievement verbs or predicates, and actions by activity verbs or predicates.1997, Robert van Valin, Randy LaPolla, Syntax, page 92
5. The number of radioactive decays per unit time. Unit for it: becquerel or curie
6. The property of substances to react with other substances