Meaning of spontaneous

spon•ta•ne•ous

Pronunciation: (spon-tā'nē-us), [key]
— adj.
  1. coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned: a spontaneous burst of applause.
  2. (of a person) given to acting upon sudden impulses.
  3. (of natural phenomena) arising from internal forces or causes; independent of external agencies; self-acting.
  4. growing naturally or without cultivation, as plants and fruits; indigenous.
  5. produced by natural process.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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