Definition of optional in English:

optional

adjective ˈɒpʃ(ə)n(ə)lˈɑpʃ(ə)n(ə)l

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

Derivatives

optionality

noun ˌɒpʃəˈnalɪtiˌɑpʃəˈnælədi

mass noun

The quality of being available to be chosen but not obligatory.
these projects provide excellent optionality for our shareholders

optionally

adverb ˈɒpʃ(ə)n(ə)liˈɑpʃ(ə)n(ə)li

The unused pieces of polenta can be cut in cubes, optionally sautéed, and simply added to a stew, a stir-fry or a soup.
Example sentencesExamples
- Users can optionally add extra keywords, or tags, to messages.
- If these effects are not judged to be sufficiently powerful, then the player may optionally move on to Emergency Stage Two.
- When you press the button corresponding to a particular configuration, it not only loads the configuration, it can also optionally launch the application!
- They could also optionally list the high school (and college if they are graduate students) that they attended, as well as their phone number, hometown, homepage and picture.

Definition of optional in US English:

optional

adjectiveˈäpSH(ə)n(ə)lˈɑpʃ(ə)n(ə)l

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

单词	optional
释义	Definition of optional in English: optional adjective ˈɒpʃ(ə)n(ə)lˈɑpʃ(ə)n(ə)l Available to be chosen but not obligatory. a wide range of optional excursions is offered Example sentencesExamples Mix together in a large bowl the rolled oats, flour, baking powder and optional spice. For the regular students of the Oxford School it forms part of their optional curriculum. He feels that Sanskrit could be introduced as one of the optional languages in schools and colleges. Unlike the Olympics, training is optional and competitors are not subjected to doping tests. By using an optional plastic film over the glass, the window can be pushed out at once rather than in pieces. Formal dress is optional, and guests are invited to bring along tables, chairs, food and drink. Victorian dress for visitors is optional and a prize will be given for the best outfit. Local residents and youngsters are invited to join in, with optional fancy dress. An optional carry case is available which features an armband strap. That helmet does mean that the optional sound-system is a bit pointless, though. Crutches became optional and people could be walking comfortably within a week. Using an apostrophe to show plurals of numbers, letters, and figures is optional. Add any or all of the optional ingredients, cooking a few more minutes before adding the parsley. The tourists can merely hire Qualis, and the services of a hostess are optional. This helps keep critters from making a home in the box if the optional locking bolt is not used. Schooling is compulsory and free for the first nine years and optional and free for the next three. The course will consist of optional modules, which cover a variety of parenting skills for young fathers. 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. Some information is given as a right and some is optional at an extra cost. Synonyms voluntary, non-compulsory, at one's discretion, discretionary, not required, up to the individual, elective, non-mandatory, free, open, unforced Law permissive rare discretional Derivatives optionality noun ˌɒpʃəˈnalɪtiˌɑpʃəˈnælədi mass noun The quality of being available to be chosen but not obligatory. these projects provide excellent optionality for our shareholders optionally adverb ˈɒpʃ(ə)n(ə)liˈɑpʃ(ə)n(ə)li The unused pieces of polenta can be cut in cubes, optionally sautéed, and simply added to a stew, a stir-fry or a soup. Example sentencesExamples Users can optionally add extra keywords, or tags, to messages. If these effects are not judged to be sufficiently powerful, then the player may optionally move on to Emergency Stage Two. When you press the button corresponding to a particular configuration, it not only loads the configuration, it can also optionally launch the application! They could also optionally list the high school (and college if they are graduate students) that they attended, as well as their phone number, hometown, homepage and picture. Definition of optional in US English: optional adjectiveˈäpSH(ə)n(ə)lˈɑpʃ(ə)n(ə)l Available to be chosen but not obligatory. a wide range of optional excursions is offered Example sentencesExamples Unlike the Olympics, training is optional and competitors are not subjected to doping tests. For the regular students of the Oxford School it forms part of their optional curriculum. The course will consist of optional modules, which cover a variety of parenting skills for young fathers. Formal dress is optional, and guests are invited to bring along tables, chairs, food and drink. Using an apostrophe to show plurals of numbers, letters, and figures is optional. That helmet does mean that the optional sound-system is a bit pointless, though. Schooling is compulsory and free for the first nine years and optional and free for the next three. People are asked to make a first choice and an optional second choice. After a light supper, there are optional devotional music and chanting sessions. Some information is given as a right and some is optional at an extra cost. Add any or all of the optional ingredients, cooking a few more minutes before adding the parsley. Mix together in a large bowl the rolled oats, flour, baking powder and optional spice. Victorian dress for visitors is optional and a prize will be given for the best outfit. This helps keep critters from making a home in the box if the optional locking bolt is not used. He feels that Sanskrit could be introduced as one of the optional languages in schools and colleges. An optional carry case is available which features an armband strap. Local residents and youngsters are invited to join in, with optional fancy dress. The tourists can merely hire Qualis, and the services of a hostess are optional. Crutches became optional and people could be walking comfortably within a week. By using an optional plastic film over the glass, the window can be pushed out at once rather than in pieces. Synonyms voluntary, non-compulsory, at one's discretion, discretionary, not required, up to the individual, elective, non-mandatory, free, open, unforced
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