Other forms: bearded; beards; bearding
A beard is the facial hair on a person's chin and cheeks. Santa Claus is famous in part for his long, white beard.
You're most likely to see a beard on an adult man, although some women grow enough facial hair to sport a beard too. Some animals, like goats, have beards as well. Someone whose presence helps another person disguise his identity — maybe because he's a spy — is often informally called a beard as well.