Definition of optional in English:



  • Available to be chosen but not obligatory.

    ‘a wide range of optional excursions is offered’
    • ‘Schooling is compulsory and free for the first nine years and optional and free for the next three.’
    • ‘Using an apostrophe to show plurals of numbers, letters, and figures is optional.’
    • ‘The course will consist of optional modules, which cover a variety of parenting skills for young fathers.’
    • ‘Victorian dress for visitors is optional and a prize will be given for the best outfit.’
    • ‘An optional carry case is available which features an armband strap.’
    • ‘Local residents and youngsters are invited to join in, with optional fancy dress.’
    • ‘For the regular students of the Oxford School it forms part of their optional curriculum.’
    • ‘Some information is given as a right and some is optional at an extra cost.’
    • ‘That helmet does mean that the optional sound-system is a bit pointless, though.’
    • ‘By using an optional plastic film over the glass, the window can be pushed out at once rather than in pieces.’
    • ‘After a light supper, there are optional devotional music and chanting sessions.’
    • ‘People are asked to make a first choice and an optional second choice.’
    • ‘Crutches became optional and people could be walking comfortably within a week.’
    • ‘This helps keep critters from making a home in the box if the optional locking bolt is not used.’
    • ‘Add any or all of the optional ingredients, cooking a few more minutes before adding the parsley.’
    • ‘Formal dress is optional, and guests are invited to bring along tables, chairs, food and drink.’
    • ‘Unlike the Olympics, training is optional and competitors are not subjected to doping tests.’
    • ‘He feels that Sanskrit could be introduced as one of the optional languages in schools and colleges.’
    • ‘Mix together in a large bowl the rolled oats, flour, baking powder and optional spice.’
    • ‘The tourists can merely hire Qualis, and the services of a hostess are optional.’
    voluntary, non-compulsory, at one's discretion, discretionary, not required, up to the individual, elective, non-mandatory, free, open, unforced
    View synonyms