vol·un·tary /'vä-lən-ˌter-ē/ adj1 a: proceeding from one's own free choice or consent rather than as the result of duress, coercion, or deceptiona voluntary statementb: not compelled by law: done as a matter of choice or agreementvoluntary arbitrationc: made freely and with an understanding of the consequencesa voluntary plea of guilty2: done by design or intention3: made without valuable consideration or for nominal considerationa voluntary conveyancevol·un·tar·i·ly /ˌvä-lən-'ter-ə-lē/ advvol·un·tar·i·ness n
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.
conative, deliberate, designed, discretionary, effected by choice, elective, facultative, free, intended, intentional, offered, optional, purposeful, self-willed, unaccidental, unbidden, uncoerced, uncompelled, unconstrained, unforced, unprompted, unrestrained, volens, volitient, volitional, volitionary, voluntarius, willful, without compulsion, without constraint
associated concepts: voluntary abandonment, voluntary acceptance, voluntary act, voluntary agreement, voluntary appearance, voluntary assignment, voluntary confession, voluntary conveyance, voluntary discontinuance, voluntary dismissal, voluntary exposure, voluntary gift, voluntary grant, voluntary homocide, voluntary manslaughter, voluntary partition, voluntary payment, voluntary petition in bankruptcy, voluntary retirement, voluntary separation, voluntary statement, voluntary suspension, voluntary testimony, voluntary trust, voluntary waste
consenting, deliberate, gratis, gratuitous (given without recompense), spontaneous, unsolicited, willful, willing (not averse)
Burton's Legal Thesaurus. William C. Burton. 2006
adj.Done willingly, without the influence of or pressure from someone else.
The Essential Law Dictionary. — Sphinx Publishing, An imprint of Sourcebooks, Inc. Amy Hackney Blackwell. 2008.