One entry found for optional.

Entry Word: optional
Function: adjective
Text: subject to one's freedom of choice <certain activities are optional, and you may choose not to participate if you wish>
Synonyms discretionary, elective, voluntary
Related Words alternative, chosen; dispensable, unnecessary, unneeded, unwanted
Near Antonyms essential, indispensable, necessary, requisite
Antonyms compulsory, mandatory, nonelective, obligatory, required