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Dictionary Meaning and Definition on 'Spontaneous'

Spontaneous Meaning and Definition from WordNet (r) 2.0
    spontaneous adj
  1. happening or arising without apparent external cause; "spontaneous laughter"; "spontaneous combustion"; "a spontaneous abortion" [syn: self-generated] [ant: induced]
  2. said or done without having been planned or written in advance; "he made a few ad-lib remarks" [syn: ad-lib, unwritten]
  3. produced without being planted or without human labor; "wild strawberries" [syn: wild]
Spontaneous Meaning and Definition from Webster's Revised Unabridged Dictionary (1913)
    Spontaneous \Spon*ta"ne*ous\, a. [L. spontaneus, fr. sponte of free will, voluntarily.]
  1. Proceding from natural feeling, temperament, or disposition, or from a native internal proneness, readiness, or tendency, without constraint; as, a spontaneous gift or proportion.
  2. Proceeding from, or acting by, internal impulse, energy, or natural law, without external force; as, spontaneous motion; spontaneous growth.
  3. Produced without being planted, or without human labor; as, a spontaneous growth of wood. Spontaneous combustion, combustion produced in a substance by the evolution of heat through the chemical action of its own elements; as, the spontaneous combustion of waste matter saturated with oil. Spontaneous generation. (Biol.) See under Generation. Syn: Voluntary; uncompelled; willing. Usage: Spontaneous, Voluntary. What is voluntary is the result of a volition, or act of choice; it therefore implies some degree of consideration, and may be the result of mere reason without excited feeling. What is spontaneous springs wholly from feeling, or a sudden impulse which admits of no reflection; as, a spontaneous burst of applause. Hence, the term is also applied to things inanimate when they are produced without the determinate purpose or care of man. ``Abstinence which is but voluntary fasting, and . . . exercise which is but voluntary labor.'' --J. Seed. Spontaneous joys, where nature has its play, The soul adopts, and owns their firstborn away. --Goldsmith. -- Spon*ta"ne*ous*ly, adv. -- Spon*ta"ne*ous*ness, n.
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Wikipedia Meaning and Definition on 'Spontaneous'

  • Spontaneous: Spontaneous is an adjective that means seeming to occur through self-generation, by one's own means, or in a way requiring no outside ...
  • Spontaneous symmetry breaking: Spontaneous symmetry breaking is the process by which a system described in a theoretically symmetrical way ends up in a non symmetrical ...
  • Spontaneous fission: Spontaneous fission (SF) is a form of radioactive decay characteristic of very heavy isotope s. It is theoretically possible for any ...
  • Spontaneous emission: Spontaneous emission is the process by which a light source such as an atom , molecule , nanocrystal or nucleus in an excited state ...
  • Spontaneous process: A spontaneous process is the time-evolution of a system in which it releases free energy (most often as heat) and moves to a lower, more ...
  • Spontaneous combustion: Spontaneous combustion is a type of combustion which occurs without an external ignition source. It is usually a slow process that can ...
  • Spontaneous order: Spontaneous order is the spontaneous emergence of order out of seeming chaos; the emergence of various kinds of social order from a ...
  • Spontaneous generation: Spontaneous generation or Equivocal generation is an obsolete theory regarding the origin of life from inanimate matter, which held that ...
  • Spontaneous remission: Spontaneous healing, also called spontaneous remission or spontaneous regression, means an unexpected improvement or cure from a disease ...

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'Spontaneous' in famous quotation sentence

* All growth is a leap in the dark, a spontaneous unpremeditated act without the benefit of experience. - Henry Miller

* Always set high value on spontaneous kindness. He whose inclination prompts him to cultivate your friendship of his own accord will love you more than one whom you have been at pains to attach to you. - Samuel Johnson

* All our thoughts and concepts are called up by sense-experiences and have a meaning only in reference to these sense-experiences. On the other hand, however, they are products of the spontaneous activity of our minds they are thus in no wise logical consequences of the contents of these sense-experiences. If, therefore, we wish to grasp the essence of a complex of abstract notions we must for the one part investigate the mutual relationships between the concepts and the assertions made about them for the other, we must investigate how they are related to the experiences. - Albert Einstein

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