1. (a.) Involving an option; depending on the exercise of an option; left to one's discretion or choice; not compulsory; as, optional studies; it is optional with you to go or stay.
2. (n.) See Elective.
Thesaurus Entries
alternative, arbitrary, autonomous, discretional, discretionary, disjunctive, elective, free, free will, gratuitous, independent, nonmandatory, offered, proffered, self-acting, self-active, self-determined, self-determining, spontaneous, unasked, unbesought, unbidden, uncalled-for, uncoerced, uncompelled, unforced, uninfluenced, uninvited, unpressured, unprompted, unrequested, unrequired, unsolicited, unsought, volitional, voluntary, volunteer, willful
