cinnamon UK /ˈsɪnəmən/US /ˈsɪəmən/noun 5adjective 2forms 1 noun5 •A spice from the dried aromatic bark of the cinnamon tree, either rolled into strips or ground into a powder. The word is commonly used as a trade name for spices made of any of the species above.cinnamon-flavoured •true cinnamon, the product made of Cinnamomum verum •A warm yellowish-brown color, the color of cinnamon.They instructed the upholsterer to do the sofa in cinnamon and the ottoman in umber. •A small evergreen tree native to Sri Lanka and southern India, Cinnamomum verum or Cinnamomum zeylanicum, belonging to the family Lauraceae. •Several related trees, notably the Indonesian cinnamon (Cinnamomum burmanni) and Chinese cinnamon or cassia (Cinnamomum aromaticum or Cinnamomum cassia). adjective2 •Containing cinnamon, or having a cinnamon taste. •Of a yellowish-brown color. formscinnamons