Last modified on 18 October 2014, at 09:54




Late Latin spontaneus, from Latin sponte (sua) (of one's free will, voluntarily).



spontaneous (comparative more spontaneous, superlative most spontaneous)

  1. Self-generated; happening without any apparent external cause.
    He made a spontaneous offer of help.
  2. Done by one's own free choice, or without planning.
  3. proceeding from natural feeling or native tendency without external constraint
  4. arising from a momentary impulse
  5. controlled and directed internally; self-active; spontaneous movement characteristic of living things
  6. produced without being planted or without human labor; indigenous
    a spontaneous growth of wood
  7. not apparently contrived or manipulated; natural
  8. Random.
  9. Sudden, without warning.


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