- any of several alcidine sea birds of the genera Fratercula and Lunda, having a short neck and a large, compressed, grooved bill, as F. arctica(Atlantic puffin ), of the North Atlantic.
- any of various northern diving birds of the family Alcidae (auks, etc), esp Fratercula arctica (common or Atlantic puffin), having a black-and-white plumage and a brightly coloured vertically flattened bill: order Charadriiformes
