optional - Definitions from Dictionary.com

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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

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.

Encyclopædia Britannica, Inc.
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American Heritage Dictionary - Cite This Source - Share This

op·tion·al Audio Help (ŏp'shə-nəl) Pronunciation Key
adj. Left to choice; not compulsory or automatic.

op'tion·al·ly adv.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

WordNet - Cite This Source - Share This

optional
adjective
possible but not necessary; left to personal choice [ant: obligatory]

Kernerman English Multilingual Dictionary - Cite This Source - Share This
ˈoptional adjective

a matter of choice
Example: Music is optional at our school; an optional subject

Arabic:	إخْتِياري
Chinese (Simplified):	可任意选择的
Chinese (Traditional):	可任意選擇的
Czech:	nepovinný, volitelný
Danish:	valgfri
Dutch:	facultatief
Estonian:	valikuline
Finnish:	valinnainen
French:	facultatif
German:	frei wählbar
Greek:	προαιρετικός
Hungarian:	(szabadon) választható
Icelandic:	valfrjáls
Indonesian:	berdasarkan pilihan
Italian:	opzionale, facoltativo

Japanese:	任意の
Korean:	선택의
Latvian:	izvēles-; fakultatīvs
Lithuanian:	laisvai pasirenkamas, fakultatyvus
Norwegian:	valgfri
Polish:	fakultatywny, do wyboru
Portuguese (Brazil):	opcional
Portuguese (Portugal):	facultativo
Romanian:	opţional, facultativ
Russian:	необязательный; факультативный
Slovak:	nepovinný, voliteľný
Slovenian:	na izbiro; neobvezen
Spanish:	opcional
Swedish:	valfri, frivillig
Turkish:	seçmeli

See also: option

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Optional

Op"tion*al\, a. 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. 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.

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