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

A second tanker - the M/T Sophia - was accused by the US of "conducting illicit activities" and boarded in the Caribbean.

From BBC

Banks are also set to capitalize on the expected surge in corporate takeover activity, as well as the pipeline of new listings expected to hit the market later this year.

From Barron's

They found that neural activity spread from the thalamus into the cortex in wave like patterns, creating synchronized activity across cortical networks.

From Science Daily

Speculative trading is below the highs of 2000 or 2021, short interest is high, equity flows are subdued and IPO activity was modest last year.

From MarketWatch

It’s where, in the early 1990s, the activity evolved out of skate parks and empty swimming pools into a global urban phenomenon that could be done nearly anywhere there were benches, stairs and railings.

From The Wall Street Journal

Related Words

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