Facultative (adjective)
definition:
not compulsory
example:
"facultative courses in the sciences"
Synonyms
ElectiveFacultative (adjective)
definition:
granting a privilege or permission or power to do or not do something
example:
"a facultative enactment"
Facultative (adjective)
definition:
able to exist under more than one set of conditions
example:
"a facultative parasite can exist as a parasite or a saprophyte"
Facultative (adjective)
definition:
of or relating to the mental faculties