optional
Word family
Longman Dictionary of Contemporary English 5++LDOCE 5++op·tion·al /ˈɒpʃənəl $ ˈɑːp-/ ●●○ AWL adjective MUSTif something is optional, you do not have to do it or use it, but you can choose to if you want to 可选择的，非强制的 OPP compulsory three optional courses 三门选修课 The other excursions are optional. 其他的短途旅行是自选项目。optional extra British English Leather seats are an optional extra. 皮座椅是可选配件。 RegisterIn everyday English, people often say that you don’t have to do something rather than say it is optional: 在日常英语中，人们一般说don’t have to do sth，而不说optional Ties are optional. → You don’t have to wear a tie. 领带不是非系不可。Examples from the Corpus
optional• Attendance at the meeting is optional.• You don't have to do French - it's optional.• At the same time optional accessories, such as cornices, light pelmets and plinths, could also be changed.• If they wish, students can do an optional dissertation, and pick up word-processing and other computer skills.• The holiday price includes entertainment in the evenings, and there are optional excursions on offer every day.• General Studies is optional for sixth-form students.• All freshmen who attend optional orientation sessions receive information on date rape.optional extra• Most of the systems offer optional extras.• No, sorry, massager is an optional extra.• Reading is not an optional extra.• This can be fitted with push release toggle as an optional extra.• Return flight back to U.K. or optional extra day in Stockholm, for sightseeing or a visit to a local woodworking group.• Etiquette and good manners are not a middle-class pastime or an optional extra for nice people.• An optional extra is a rainfall monitor.• Atheism for Marxism is not an optional extra or a mere facet but the very essence of it.From Longman Business Dictionaryoptionalop‧tion‧al /ˈɒpʃənəlˈɑːp-/ adjective if something is optional, you can choose whether or not you have it, do it, or use itYou can have a 17-inch monitor as an optional extra (=something that is additional to or better than the basic type).The use of a password to access the system is optional. → compare standard2op·tion·al adjective →REGISTER1ChineseSyllable
you to have do it Corpus optional, is something Business do not if
optional
op‧tion‧al AC /ˈɒpʃənəl $ ˈɑːp-/
adjectiveif something is optional, you do not have to do it or use it, but you can choose to if you want to
OPP compulsory:
three optional courses
The other excursions are optional.
optional extra British English:
Leather seats are an optional extra.
REGISTER
In everyday English, people often say that you don’t have to do something rather than say it is optional:
▪ Ties are optional. ➔ You don’t have to wear a tie.
■ not compulsory
▪optional if something is optional, you can choose whether to do it or not: You don’t have to do French – it’s optional. | The holiday price includes optional excursions such as an evening cruise on the lake. | General Studies is optional for sixth-form students.
▪voluntary done because you want to do it and not because you have to – used especially about things that you do because you think they will help other people or be useful: The programme is entirely voluntary, and no one will be forced to join. | The charity is funded by voluntary donations.
op‧tion‧al AC /ˈɒpʃənəl $ ˈɑːp-/
adjectiveif something is optional, you do not have to do it or use it, but you can choose to if you want to OPP compulsory:
optional extra British English:
REGISTER
In everyday English, people often say that you don’t have to do something rather than say it is optional:
▪ Ties are optional. ➔ You don’t have to wear a tie.
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