Alphabet Filter:


Definition of optional:

  1. 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. See Elective, n.


free, facultative, unforced, nonmandatory, choice, arbitrary, noncompulsory, with no strings attached, ex gratia, nonobligatory, voluntary, unrestricted, elective, not required, take it or leave it, volitional.

Usage examples: