- any large, web-footed, seabird of the family Sulidae, having a sharply pointed bill, long wings, and a wedge-shaped tail, noted for its plunging dives for fish.
- any of several heavily built marine birds of the genus Morus (or Sula), having a long stout bill and typically white plumage with dark markings: family Sulidae, order Pelecaniformes (pelicans, cormorants, etc)
- a gluttonous or greedy person
