ac·tiv·i·ty 
/ækˈtɪvəti/ noun
plural ac·tiv·i·ties /ækˈtɪvəti/ noun 1 [noncount] : the state of being active
▪ The holidays always set off a lot of activity in our home. : behavior or actions of a particular kind ▪ the sexual activity of married couples ▪ The police are now monitoring criminal/gang/drug activity in the area. ▪ There has been an increase in the city's (level of) economic activity. ▪ She gets at least 30 minutes of physical activity every day. ▪ The instruments are used to detect volcanic activity on the island. 2 [count] : something that is done as work or for a particular purpose — usually plural ▪ Grandma needs help with her everyday/daily activities. ▪ business activities ▪ political activities ▪ They were accused of financing the group's illegal activities. 3 [count] : something that is done for pleasure and that usually involves a group of people
▪ We planned an activity for the children. — usually plural ▪ The camp offers hiking, swimming, and other recreational activities. ▪ social activities
▪ The holidays always set off a lot of activity in our home. : behavior or actions of a particular kind ▪ the sexual activity of married couples ▪ The police are now monitoring criminal/gang/drug activity in the area. ▪ There has been an increase in the city's (level of) economic activity. ▪ She gets at least 30 minutes of physical activity every day. ▪ The instruments are used to detect volcanic activity on the island.
▪ We planned an activity for the children. — usually plural ▪ The camp offers hiking, swimming, and other recreational activities. ▪ social activities
