tawny owlTranslate tawny owl | into Spanish Definition of tawny owl noun 1a common Eurasian owl with either reddish-brown or grey plumage and a familiar quavering hoot. Strix aluco, family Strigidae 2 (Tawny Owl) informal (in the UK) the assistant adult leader of a pack of Brownie Guides, officially termed Assistant Brownie Guider since 1968. tawny owl in other Oxford dictionaries Definition of tawny owl in the US English dictionary