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40 results for: optional

Dictionary Entries (4 more entries. View all »)
Dictionary.com Unabridged (v 1.1)Cite This Source
op·tion·al    Audio Help   [op-shuh-nl] Pronunciation Key
–adjective
1.left to one's choice; not required or mandatory: Formal dress is optional.
2.leaving something to choice.
[Origin: 1755–65; option + -al1]

—Related forms
op·tion·al·i·ty, noun
op·tion·al·ly, adverb

—Synonyms 1. discretional, elective, voluntary.
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Thesaurus Entries
  Roget's II: The New ThesaurusCite This Source
Main Entry:  optional
Part of Speech:  adjective
Definition:  Not compulsory or automatic.
Synonyms:  discretionary, elective, facultative
Source:  Roget's II: The New Thesaurus, Third Edition
by the Editors of the American Heritage® Dictionary.
Copyright © 2003, 1995 by Houghton Mifflin Harcourt Publishing Company.
Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
  Synonym Collection v1.1Cite This Source
Main Entry:  optional
Part of Speech:  adjective
Synonyms:  alternative, available, contingent, discretionary, discriminative, elective, facultative, preferential, unforced, voluntary, discretional, nonobligatory
Source:  Synonym Collection v1.1
Copyright © 2008 by Lexico Publishing Group, LLC.

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