voy·age / ˈvoi-ij/ • n. a long journey involving travel by sea or in space: a six-year voyage to Jupiter | fig. writing a biography is a voyage of discovery. • v. [intr.] go on a long journey, typically by sea or in space: he has voyaged through places like Venezuela and Peru. ∎ [tr.] archaic sail over or along (a sea or river).DERIVATIVES: voy·age·a·ble adj. ( archaic )voy·ag·er n.