From Longman Business Dictionaryguaranteed income bondˌguaranteed ˈincome bondFINANCE a bond where you invest a sum for a fixed period of time, and the financial institution promises that the return will not be below a particular amount. Guaranteed income bonds are sometimes combined with life insuranceA £3000 investment in the five-year guaranteed income bond from Pinnacle Insurance will earn 6.4% net of basic rate tax. → bond