Home › Words › O › oilbirdoilbirdoilbird means A nocturnal South American bird, of the species Steatornis caripensis of the order Steatornithiformes, related to the nightjars that feeds on the fruit of the oil palm and tropical laurels.Among words judged in Lexicurio's Arena, oilbird ranks #7,275 of 42,752 for Qualifying.EtymologyFrom oil + bird.nounA nocturnal South American bird, of the species Steatornis caripensis of the order Steatornithiformes, related to the nightjars that feeds on the fruit of the oil palm and tropical laurels.Definitions & examples from Wiktionary (CC BY-SA 3.0).