Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adjective: facultative  'fa-kul,tey-tiv [N. Amer], fa-kul-tu-tiv [Brit]
  1. Granting a privilege or permission or power to do or not do something
    "a facultative enactment"
  2. Optional
    - elective
  3. Of or relating to the mental faculties
  4. (biology) able to exist under more than one set of conditions
    "a facultative parasite can exist as a parasite or a saprophyte"

See also: enabling, optional

Antonym: obligate

Encyclopedia: Facultative