Meaning of ACTIVITY in English
n. 1 action, movement, motion, vigour, vim, energy, liveliness, bustle Last week there wasn't much activity in the stock market 2 pursuit, occupation, vocation, work, function, operation, job, labour, endeavour, enterprise, project, undertaking, venture, interest: What sort of business activity are you engaged in?
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012