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.

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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

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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

Global exploration activity is rising, rig utilization has increased across all regions and Imdex tools on hire have grown since 4Q.

From The Wall Street Journal

A notice taped outside one door says unauthorized entry is prohibited: “This includes all federal law enforcement personnel and activities unless authorized by lawful written direction from appropriate school officials or a valid court order.”

From Los Angeles Times

A rise in margin requirements raises the cost of holding positions, forcing traders to commit more capital and typically weighing on prices and trading activity.

From The Wall Street Journal

We learned he had registered his channel as a business in Sweden, where he claims to be conducting "influencer activities, marketing and advertising".

From BBC

Asian manufacturers started the year on a strong note, with factory activity ticking up in major exporters like Japan and South Korea, and business sentiment brightening.

From The Wall Street Journal

Related Words

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