Definition, Meaning, Synonyms & Anagrams | English word OPTIONAL

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Definitions of OPTIONAL

1. Not compulsory; left to personal choice; elective.
2. Something that is not compulsory, especially part of an academic course.
3. (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.

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Examples of Using OPTIONAL in a Sentence

• Impure abjads represent vowels with either optional diacritics, a limited number of distinct vowel glyphs, or both.
• This contrasts with a full alphabet, in which vowels have status equal to consonants, and with an abjad, in which vowel marking is absent, partial, or optional – in less formal contexts, all three types of the script may be termed "alphabets".
• Newer files have a header that consists of six unsigned 32-bit words, an optional information chunk which is always of non-zero size, and then the data (in big-endian format).
• Participants jump from a fixed object such as a cliff and after an optional freefall delay deploy a parachute to slow their descent and land.
• K-Meleon became a popular Windows browser and was available as an optional default browser in Europe via BrowserChoice.
• There are exceptions, such as the VAX architecture, which includes optional support of the PDP-11 instruction set; the IA-64 architecture, which includes optional support of the IA-32 instruction set; and the PowerPC 615 microprocessor, which can natively process both PowerPC and x86 instruction sets.
• Quasigroups differ from groups mainly in that the associative and identity element properties are optional.
• A symbol in a syllabary, called a syllabogram, typically represents an (optional) consonant sound (simple onset) followed by a vowel sound (nucleus)—that is, a CV (consonant+vowel) or V syllable—but other phonographic mappings, such as CVC, CV- tone, and C (normally nasals at the end of syllables), are also found in syllabaries.
• For any change in the constitution, a referendum is mandatory (mandatory referendum); for any change in a law, a referendum can be requested (optional referendum).
• Data Facility Storage Management Subsystem (MVS), central component of z/OS, optional in some older forms of MVS.
• It is a type of polyphase system employing three wires (or four including an optional neutral return wire) and is the most common method used by electrical grids worldwide to transfer power.
• Although the ISO and ANSI standards writers coordinated their work, so the differences between the standards are mainly editorial, there is one meaningful difference: ADCCP's definition of the basic subset required to implement balanced asynchronous mode includes the RSET frame, while HDLC makes it optional.
• An optional unbundled feature, generally associated with the basic serving arrangement (BSA), that an enhanced-service provider (ESP) may require or find useful in configuring an enhanced service.
• Physically, an electrical cable is an assembly consisting of one or more conductors with their own insulations and optional screens, individual coverings, assembly protection and protective covering.
• The court hears applications alleging that a contracting state has breached one or more of the human rights enumerated in the convention or its optional protocols to which a member state is a party.
• A syllable is a unit of organization for a sequence of speech sounds, typically made up of a syllable nucleus (most often a vowel) with optional initial and final margins (typically, consonants).
• A fourth optional parameter (not used here) specifies how far the arc continues, and defaults to 5 degrees.
• The book was prescribed for the second year Bachelor of Arts (English) in 2007–08 as an optional text, according to University sources.
• Furthermore, narrative techniques are distinguished from narrative elements, which exist inherently in all works of narrative, rather than being merely optional strategies.
• There are no standard abbreviations for provinces' names; but the province name is optional and usually not needed if the postal code is correct.

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