noun (plural activities)
- 1 [mass noun] The condition in which things are happening or being done: there has been a sustained level of activity in the economyMore example sentences
- A study in chimpanzees showed lower levels of sexual activity when the females were given oral contraceptives.
- A second, functional level of military activity responded to shifts in the conduct of operations.
- In contrast, growth of business activity across the UK private sector as a whole picked up slightly to a strong pace.
- 1.1Busy or vigorous action or movement: the room was a hive of activityMore example sentences
bustle, hustle and bustle, busyness, action, liveliness, movement, life, stir, animation, commotion, flurry, tumult, hubbub, excitement, agitation, fuss, whirl; happenings, occurrences, proceedings, events, incidents
- The post office was always a hive of activity with people bustling about.
- After breakfast, the house is bustling with activity and movement.
- The locality has been a hive of activity in recent weeks.
- 2 (usually activities) A thing that a person or group does or has done: the firm’s marketing activitiesMore example sentences
- The children attending the club have an opportunity to do homework and other activities.
- The pain may result in inability to do routine work or household activities.
- He said there was no connection between his gifts to to the Party and his business activities.
- 2.1A recreational pursuit or pastime: a range of sporting activitiesMore example sentences
- He said the club's social activities have ranged from football to having its own choral society.
- Most contracts will exclude any hazardous water sports or adventurous activities.
- He encouraged the men to get involved in sporting activities, and football soon became a favourite.
- 3 Chemistry 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.More example sentences
- The activity coefficient of, say, a urea molecule in solution results from its interaction with other urea molecules.
- Methods of correcting the activity coefficient of carbon for alloy content are available.
- While hydrogen amounts were the same, the hydrogen ions were altered to present a much higher degree of activity.
late Middle English: from French activité or late Latin activitas, from Latin act- 'done', from the verb agere.