n.
     - the feeling of wanting to know about something or someone. ▸a quality exciting curiosity or holding the attention: ![]()  a tale full of interest. 
▸a subject which one enjoys doing or studying. 
- money paid for the use of money lent, or for delaying the repayment of a debt.
- the advantage or benefit of someone. ▸archaic self-interest. 
- a share or involvement in an undertaking. ▸a legal concern, title, or right in property. 
- a group having a common concern, especially in politics or business.
v.
  - excite the curiosity or attention of. ▸
(interest someone in)
 persuade someone to undertake or acquire. 
- 
[as adj. interested]
 having an interest or involvement; not impartial:![]()  seeking views from interested parties. 
Phrase
  
    - at interest
 (of money borrowed) on the condition that interest is payable.
- declare an 
(or one's)
 interest
 make known one's financial interests in an undertaking before it is discussed.
- in the interests 
(or interest)
 of something
 for the benefit of.
 
  Derivative
  
    - interestedly adv.
- interestedness n.
 
  Etymology
  ME (orig. as interess ‘the possession of a share in or a right to something’): from Anglo-Norman Fr. interesse, from L. interesse ‘differ, be important’, from inter- ‘between’ + esse ‘be’; the -t was added by assoc. with OFr. interest ‘damage, loss’.