Definition of: orang-utan

(ō·rang′ə·tan, -·tan) noun plural ·tans or ·tan
A large, anthropoid ape (genus Pongo or Simia) of Borneo and Sumatra, about 4 1/2 feet in height, having brownish–red hair, brown skin, small ears, doglike teeth, narrow lips, and long arms reaching to the ankles: also called orang. Also o·rang′–ou·tang (-ə·tang, -·tang). [<Malay ora utan <ora a man + utan a forest]