tealPronunciation: /tiːl/Definition of teal noun (plural same or teals) a small freshwater duck, typically with a greenish band on the wing that is most prominent in flight. Genus Anas, family Anatidae: several species, in particular the common Eurasian and Canadian (green-winged) teal (A. crecca) (also teal blue) [mass noun] a dark greenish-blue colour. Origin: Middle English: of unknown origin; related to Dutch telingteal in other Oxford dictionaries Definition of teal in the US English dictionary