interest

American  

[in-ter-ist, -trist] / ˈɪn tər ɪst, -trɪst /

noun

interests plural

1. the feeling of a person whose attention, concern, or curiosity is particularly engaged by something.

   She has a great interest in the poetry of Donne.

2. something that concerns, involves, draws the attention of, or arouses the curiosity of a person.

   His interests are philosophy and chess.

3. power of exciting such concern, involvement, etc.; quality of being interesting.

   political issues of great interest.

4. concern; importance.

   a matter of primary interest.

5. a business, cause, or the like in which a person has a share, concern, responsibility, etc.

6. a share, right, or title in the ownership of property, in a commercial or financial undertaking, or the like.

   He bought half an interest in the store.

7. a participation in or concern for a cause, advantage, responsibility, etc.

8. a number or group of persons, or a party, financially interested in the same business, industry, or enterprise.

   the banking interest.

9. interests, the group of persons or organizations having extensive financial or business power.

10. the state of being affected by something in respect to advantage or detriment.

    We need an arbiter who is without interest in the outcome.

11. benefit; advantage.

    to have one's own interest in mind.

12. regard for one's own advantage or profit; self-interest.

    The partnership dissolved because of their conflicting interests.

13. influence from personal importance or capability; power of influencing the action of others.

14. Finance.

    1. a sum paid or charged for the use of money or for borrowing money.

       If I won the lottery, I would invest the money, quit working and live off the interest.

    2. interest rate.

15. something added or thrown in above an exact equivalent.

    Jones paid him back with a left hook and added a right uppercut for interest.

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verb (used with object)

interests, present (3rd person singular) interested, past participle, past interesting present participle

1. to engage or excite the attention or curiosity of.

   Mystery stories interested him greatly.

2. to concern (a person, nation, etc.) in something; involve.

   The fight for peace interests all nations.

3. to cause to take a personal concern or share; induce to participate.

   to interest a person in an enterprise.

4. to cause to be concerned; affect.

idioms

1. in the interest(s) of, to the advantage or advancement of; in behalf of.

   in the interests of good government.

interest British  

/ -tərɪst, ˈɪntrɪst /

noun

1. the sense of curiosity about or concern with something or someone

   an interest in butterflies

2. the power of stimulating such a sense

   to have great interest

3. the quality of such stimulation

4. something in which one is interested; a hobby or pursuit

5. (often plural) benefit; advantage

   in one's own interest

6. (often plural)

   1. a right, share, or claim, esp in a business or property

   2. the business, property, etc, in which a person has such concern

7. 1. a charge for the use of credit or borrowed money

   2. such a charge expressed as a percentage per time unit of the sum borrowed or used

8. (often plural) a section of a community, etc, whose members have common aims

   we must not offend the landed interest

9. to make known one's connection, esp a prejudicial connection, with an affair

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verb

1. to arouse or excite the curiosity or concern of

2. to cause to become involved in something; concern

interest Cultural  

1. The charge for borrowing money or the return for lending it.

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interest More Idioms  

1. see in one's interest; take an interest; vested interest; with interest.

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Other Word Forms

Derived Forms

• overinterest
  noun
• preinterest
  noun
• reinterest
  noun

Inflected Forms

Nouns

• interests
  plural

Participles

• interesting
  present
• interested
  past

Conjugated Forms

Present

• interest
  simple
• interests
  simple
• have interested
  perfect
• has interested
  perfect
• am interesting
  progressive
• are interesting
  progressive
• is interesting
  progressive
• have been interesting
  perfect progressive
• has been interesting
  perfect progressive

Past

• interested
  simple
• had interested
  perfect
• was interesting
  progressive
• were interesting
  progressive
• had been interesting
  perfect progressive

Future

• will interest
  simple
• will have interested
  perfect
• will be interesting
  progressive
• will have been interesting
  perfect progressive

Etymology

Origin of interest

First recorded in 1225–75; Middle English noun interest, intrest, entrest “legal claim or right,” from Medieval Latin, Latin interest “it concerns,” literally, “it is between,” replacing the Medieval Latin infinitive interesse, used as a noun, from Latin; see inter-, esse

Explanation

Interest is used most often to describe something you like, enjoy or think useful. You might have an interest in African literature, or you might follow the news with interest. Although interest is used mainly to describe anything that is, well, interesting, it also is used in specific legal contexts. If you have an interest in a company, it means you own part of it. Interest is also the word used to describe money charged or given as part of a debt. If a bank loans you $10,000, you have to pay back the $10,000 plus the interest. If the interest rate is 5 percent annually, you would owe $500.

Example Sentences

Interest costs are already eating up some 20% of state revenue, de Sousa adds, though Petro’s government temporarily shrank that through a short-term “liability management exercise.”

From Barron's • Jun. 22, 2026

Interest rates are the primary tool used to control inflation; they also influence the cost of borrowing as well as the interest paid to savers.

From BBC • Jun. 18, 2026

Interest rates are the primary tool used to control inflation, which is the rate at which prices rise.

From BBC • Jun. 17, 2026

Interest has accelerated as the tech industry touts the technology as a solution to the massive electricity demands of artificial intelligence.

From The Wall Street Journal • Jun. 9, 2026

Interest in talking to the dead ticked up once more.

From "American Spirits" by Barb Rosenstock

Related Words

• affect
• amuse
• appeal to
• attract
• concern
• engage
• engross
• entertain
• excite
• fascinate
• intrigue
• involve
• please
• tempt