Entry 1 sense Webster, 1913 ullet /(ŭl"lĕt)/ · ul·let · IPA 01 n. A European owl (Syrnium aluco) of a tawny color; -- called also uluia. 1. A European owl (Syrnium aluco) of a tawny color; -- called also uluia.(Zool.) Also: uluia