activity

American  

[ak-tiv-i-tee] / ækˈtɪv ɪ ti /

noun

plural

activities

1. the state or quality of being active.

   There was not much activity in the stock market today. He doesn't have enough physical activity in his life.

2. a specific deed, action, function, or sphere of action.

   social activities.

3. work, especially in elementary grades at school, that involves direct experience by the student rather than textbook study.

4. energetic activity; animation; liveliness.

5. a use of energy or force; an active movement or operation.

6. normal mental or bodily power, function, or process.

7. Physical Chemistry. the capacity of a substance to react, corrected for the loss of reactivity due to the interaction of its constituents.

8. Physics.

   1. the number of atoms of a radioactive substance that disintegrate per unit of time, usually expressed in curies.

   2. radioactivity.

9. an organizational unit or the function it performs.

---

activity British  

/ ækˈtɪvɪtɪ /

noun

1. the state or quality of being active

2. lively action or movement

3. any specific deed, action, pursuit, etc

   recreational activities

4. the number of disintegrations of a radioactive substance in a given unit of time, usually expressed in curies or disintegrations per second

5. 1. the capacity of a substance to undergo chemical change

   2. the effective concentration of a substance in a chemical system. The absolute activity of a substance B, λ B , is defined as exp (μ B RT ) where μ B is the chemical potential

---

Other Word Forms

• nonactivity noun
• preactivity noun
• superactivity noun

Etymology

Origin of activity

First recorded in 1520–30; from Middle French or directly from Medieval Latin āctīvitās; active, -ity

Example Sentences

After he joined the 2022 protests, he says, she became critical of his activities and unsympathetic over the deaths of friends of his in the January protests.

From BBC

The total value of all deals announced globally jumped roughly 29% in the first quarter from a year ago, but the number of deals is down more than 17% as smaller-deal activity slowed.

From The Wall Street Journal

"Physical activity, such as resistance training, is important to counteract potential negative effects on muscle strength," he added.

From BBC

Demographic groups that traditionally perceived golf as a country-club activity were suddenly tuning in.

From The Wall Street Journal

It includes measures such as banning activities in certain areas where species could be harmed or killed, like dam construction.

From BBC

Related Words

• act
• endeavor
• enterprise
• job
• project
• scheme
• task
• venture
• work