Part of speech: adjective
Origin: French, early 19th century
Dealing with permissions and the granting of them
Happening in some circumstances but not all
Examples of Facultative in a sentence
"Recent facultative legislation has increased the ability for teachers to discipline their students."
"Your facultative capabilities leave much to be desired."
In biology, "facultative" is used to describe instances in the animal or plant kingdom where a species is able to choose between two behaviors or traits. For example, facultative bipedalism is the ability of an animal to travel on either two legs or four.
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Your facultative capabilities leave much to be desired.