Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. spontaneous; voluntary

from the GNU version of the Collaborative International Dictionary of English

  • adj. Spontaneous; voluntary.

from The Century Dictionary and Cyclopedia

  • Spontaneous; voluntary.

Etymologies

Latin ultroneus, from ultro to the further side, on his part, of one's own accord. See ultra-. (Wiktionary)

Examples

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