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  Roget's II: The New Thesaurus
Main Entry:  optional
Part of Speech:  adjective
Definition:  Not compulsory or automatic.
Synonyms:  discretionary, elective, facultative
  Synonym Collection v1.1
Main Entry:  optional
Part of Speech:  adjective
Synonyms:  alternative, available, contingent, discretional, discretionary, discriminative, elective, facultative, nonobligatory, preferential, unforced, voluntary
Antonyms:  coercive, compulsory, obligatory

Copyrights:

Cite This 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.
 
Cite This Source   Synonym Collection v1.1
Copyright © 2008 by Lexico Publishing Group, LLC.
 

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