Noun | 1. | Siluridae - Old World catfishes fish family - any of various families of fish order Siluriformes, Siluriformes - an order of fish belonging to the superorder Malacopterygii including catfishes silurid, silurid fish - Old World freshwater catfishes having naked skin and a long anal fin more or less merged with the eellike caudal fin genus Silurus, Silurus - type genus of the Siluridae: catfishes genus Malopterurus, Malopterurus - electric catfish |