adj. 1 Law enabling an act to take place. 2 that may occur. 3 Biol. not restricted to a particular function, mode of life, etc. 4 of a faculty. facultatively adv.
[ F facultatif -ive (as FACULTY) ]
FACULTATIVE
Meaning of FACULTATIVE in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012