Ŏp'tion-al, a.
(ōp'shun-al), a. [See supra.] 1. Left to one's wish or choice; depending on choice or preference; as, it is optional with you to go or stay.
If to the former the movement was not optional, it was the same that the latter chose when it was optional. Palfrey.
Sense 2. Involving an option, or power of choice; leaving something to choice.
Original writs are either optional or peremptory. Blackstone.