
a. Involving an option; depending on the exercise of an option; left to one's discretion or choice; allowed but not compulsory;
If to the former the movement was not optional, it was the same that the latter chose when it was optional. Palfrey. [ 1913 Webster ]
Original writs are either optional or peremptory. Blackstone. [ 1913 Webster ]
adv. In an optional manner. [ 1913 Webster ]