Real Dictionary

interest
countable noun: Your interests are the things that you enjoy doing.
variable noun: If you have an interest in something, you want to learn or hear more about it.
verb: If something interests you, it attracts your attention so that you want to learn or hear more about it or continue doing it.

interest in Accounting
noun: Interest is the extra money that you pay if you have borrowed money, or the extra money that you receive if you have money in some types of bank account.

interest in American English
a right or claim to something
noun: the feeling of a person whose attention, concern, or curiosity is particularly engaged by something

interest in British English
to arouse or excite the curiosity or concern of
noun: the sense of curiosity about or concern with something or someone

interest in Finance
noun: Interest is the extra money that you pay if you have borrowed money, or the extra money that you receive if you have money in some types of bank account.