optionaladjective
uk/ˈɒp.ʃən.əl/us/ˈɑːp.ʃən.əl/B2 If something is optional, you can choose if you want to do it, pay it, buy it, etc.:
English is compulsory for all students, but art and music are optional.
More examples
- Seat-belts are included as standard but electric windows are an optional extra.
- My phone came with 20 optional ringtones.
- Do come to the party - fancy dress is optional.
- There are several optional tours, for which there will be a small charge.
- The basic model is quite cheap, but there are a lot of optional extras.
Thesaurus: synonyms and related words
Taking and choosing
- accord
- adopt
- adopted
- adoption
- appoint
- bags I... idiom
- dip
- easy option
- either-or
- elect
- empanel
- go off with sth
- have/keep your options open idiom
- selection
- selective
- selector
- self-selected
- single sb/sth out
- skim sb/sth off
- slate
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