Definition for Optional:

• Left to one's wish or choice.

Synonyms for Optional:

• n.

  •
  • going,
  • accessible,
  • seasonal,
  • vacant,
  • public,
  • available,
  • usable,
  • spare.
  •
  • choice.
  •discretionary (noun)
  • unrestricted,
  • noncompulsory,
  • volitional,
  • free,
  • not required.

• Other synonyms:

  •
  • open-ended.
  •Other relevant words:
  • option,
  • uninfluenced,
  • alternative,
  • electives,
  • unrequested,
  • extracurricular,
  • unasked,
  • unessential,
  • inessential,
  • supplementary,
  • free will,
  • Offered,
  • self-acting,
  • disjunctive,
  • unpressured,
  • unsolicited,
  • wilful,
  • optionally,
  • independent,
  • unneeded,
  • up to the individual,
  • unrequired,
  • external,
  • uninvited,
  • gratuitous,
  • unconstrained,
  • self-determined,
  • planned,
  • deliberate,
  • unsought,
  • Self-determining,
  • volunteer,
  • Volitive,
  • no strings attached,
  • unprompted,
  • intentional,
  • nonobligatory,
  • Proffered,
  • any,
  • Willed,
  • nonmandatory,
  • Volitient,
  • premeditated,
  • intended,
  • willful,
  • ex gratia,
  • spontaneous,
  • Unbesought,
  • Self-active,
  • secondary,
  • permissive,
  • extramural,
  • additional,
  • freewill,
  • non-compulsory,
  • selective,
  • autonomous,
  • uncalled-for,
  • uncoerced.

Paraphrases for Optional:

• Equivalence

  • Adjective
    facultative.
  • Noun, singular or mass
    facultative.

• Independent

  • Adjective
    opt-in, option, non-compulsory, permissive, mandatory, optionally, voluntary, non-statutory, selective, compulsory, options.
  • Proper noun, singular
    Rights, Children, careers, option, Cas, optionally, voluntary, options.
  • Noun, plural
    electives, institutions, options.
  • Noun, singular or mass
    option.
  • Verb, past participle
    signed, used.

Antonyms for Optional:

• adj.

  • all
    obligatory.
  • possible; available as choice
    forced, required, compulsory.
  • Other antonyms:
    imposed, prerequisite, nonelective, necessary, nonvoluntary, indispensable, incumbent on, essential, requisite, de rigueur, bounden.

• Other antonyms:

  • n.
    appointed, appointive, coercive, obligate.