optional
(adjective) possible but not necessary; left to personal choice
Source: WordNet® 3.1
optional (not comparable)
Not compulsory; left to personal choice; elective.
Synonyms: facultative, Thesaurus:optional
Antonyms: compulsory, mandatory, obligatory, Thesaurus:compulsory
optional (plural optionals)
Something that is not compulsory, especially part of an academic course.
(programming, sometimes, capitalized) In various programming languages, a kind of variable that is assigned a specific data type but may or may not hold an actual value.
• Politano
Source: Wiktionary
Op"tion*al, a.
Definition: Involving an option; depending on the exercise of an option; left to one's discretion or choice; not compulsory; as, optional studies; it is optional with you to go or stay.
– n.
Definition: See Elective, n. If to the former the movement was not optional, it was the same that the latter chose when it was optional. Palfrey. Original writs are either optional or peremptory. Blackstone.
Source: Webster’s Unabridged Dictionary 1913 Edition
26 November 2024
(noun) (music) playing in a different key from the key intended; moving the pitch of a piece of music upwards or downwards
Decaffeinated coffee is not caffeine-free. Studies from the National Institute of Health (US) have shown that virtually all decaf coffee types contain caffeine. A 236-ml (8-oz) cup of decaf coffee contains up to 7 mg of caffeine, whereas a regular cup provided 70-140 mg.
