definition of
interest

[1] #1 interest n. [involvement] a sense of concern with and curiosity about someone or something; "an interest in music". wn

[2] #2 interest n. [sake] a reason for wanting something done; "for your sake"; "died for the sake of his country"; "in the interest of safety"; "in the common interest". wn

[3] #3 interest n. [interestingness] the power of attracting or holding one's attention (because it is unusual or exciting etc.); "they said nothing of great interest"; "primary colors can add interest to a room". wn

[4] #4 interest n. a fixed charge for borrowing money; usually a percentage of the amount borrowed; "how much interest do you pay on your mortgage?". wn

[5] #5 interest n. [stake] (law) a right or legal share of something; a financial involvement with something; "they have interests all over the world"; "a stake in the company's future". wn