Definitions of cinnamon:

• noun:   spice from the dried aromatic bark of the Ceylon cinnamon tree; used as rolled strips or ground
• noun:   tropical Asian tree with aromatic yellowish-brown bark; source of the spice cinnamon
• noun:   aromatic bark used as a spice
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #18290)