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The Ultimate GRE Word List & Dictionary

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optional

audio pronunciation audio pronunciation
adjective
  • that may be chosen or not, as one wishes; not compulsory [Barron]

More word meanings for optional
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Wiktionary:
optional @ wiktionary
WordNet:
optional @ wordnet.princeton.edu
Merriam-Webster Online:
optional @ M-W.com
MSN Encarta:
optional @ Encarta
American Heritage Dictionary of the English Language:
optional @ AHD provided by Yahoo! Education
Answers.com:
optional @ Answers.com
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