The word "optional" in English means: Available but not required., Something you can choose to do or have, but it is not necessary..
The phonetic transcription of "optional" is /ˈɒpʃənəl/ in British English and /ˈɑːpʃənəl/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "optional": voluntary, elective, discretionary.
Example usage of "optional": "Wearing a helmet is optional on this bike tour, but recommended.". More examples on the page.