crested /ˈkɹɛstɪd/adjective 2noun 1forms 1 adjective2 •Having a crest, or ornamental tuft (on an animal) or plume (on a helmet). •Having a heraldic crest, badge, shield-like emblem, etc.In great confusion, Gordon accepted the letter, broke its small crested seal, and began reading the neat back-hand scrawl. — 1936 noun1 •Any of various creatures having a crest.Fourth, impure cresteds (with one of each alleles) will produce the crests on the heads of live birds, and it is these birds which are exhibited as Balis or Crested Ducks. — 2000 formscresteds