Owlet \Owl"et\, n. [Dim. of owl. Cf. {Howlet}.] (Zool.) A small owl; especially, the European species ({Athene noctua}), and the California flammulated owlet ({Megascops flammeolus}). [1913 Webster] {Owlet moth} (Zool.), any noctuid moth. [1913 Webster]