interest

American  

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

noun

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

Conjugated Forms

Present

• have interested
  perfect
• has interested
  perfect 3rd person singular
• have been interesting
  perfect progressive
• interests
  singular 3rd person
• has been interesting
  perfect progressive 3rd person singular
• am interesting
  progressive 1st person singular
• interesting
  participle
• is interesting
  progressive 3rd person singular
• are interesting
  progressive

Past

• had interested
  perfect
• were interesting
  progressive plural
• was interesting
  progressive singular
• interested
  simple
• interested
  participle
• 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

Cheap hydropower, relatively low labor costs and proximity to U.S. markets have further deepened investor interest.

From The Wall Street Journal • Jun. 9, 2026

The follow-up work included inspecting suspected areas of interest and reviewing places where sealant had already been applied.

From Science Daily • Jun. 8, 2026

China also called on the two sides to refrain from fighting, with foreign ministry spokesman Lin Jian saying that "resuming hostilities is not in any party's interest".

From Barron's • Jun. 8, 2026

If you still haven’t paid, the IRS penalties are growing at a 6% annual interest rate.

From MarketWatch • Jun. 8, 2026

I think she was trying to measure if I really had a lick of interest in sites of historical significance or if I was sassing her.

From "The Detective's Assistant" by Kate Hannigan

Related Words

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