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These environmental changes are the result of human activity.
Economic activity was greater during the first part of the year.
Airline employees should always be on the watch for criminal activity.
Employees should not engage in political activities without a manager’s permission.
She monitors the activities of federal law enforcement agencies.
We plan to expand our business activities in East Africa.
Guests can enjoy plenty of activities, like swimming, surfing, and horseback riding.
This is the American English definition of activity. View British English definition of activity.