noun

1. The price paid for obtaining, or price received for providing, money or goods in a credit transaction, calculated as a fraction of the amount or value of what was borrowed.

   “Our bank offers borrowers an annual interest of 5%.”

2. Any excess over and above an exact equivalent

3. A great attention and concern from someone or something; intellectual curiosity.

   “He has a lot of interest in vintage cars.”

Synonyms: cost of money, oker

verb

1. To engage the attention of; to awaken interest in; to excite emotion or passion in, in behalf of a person or thing.

   “Action films don't really interest me.”

2. To be concerned with or engaged in; to affect; to concern; to excite.

3. To cause or permit to share.