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1. Dictionary

   spontaneous

   /spɒnˈteɪnɪəs/

   adjective

   • 1. performed or occurring as a result of a sudden impulse or inclination and without premeditation or external stimulus: "the audience broke into spontaneous applause" Similar unforcedvoluntaryunconstrainedunpromptedunbiddenunsolicitedunplannedunpremeditatedunrehearsedimpulsiveimpetuousunstudiedimpromptuspur-of-the-momentextemporeextemporaneousunschooleduntaughtuninstructedinformal:off-the-cuffOpposite plannedforcedcalculated
   • ▪ having an open, natural, and uninhibited manner. Similar naturaluninhibitedrelaxedunselfconsciousunaffectedeasyfree and easyimpulsiveimpetuousopengenuineOpposite inhibited
   • ▪ (of a process or event) occurring without apparent external cause: "spontaneous miscarriages"
   • ▪ (of movement or activity in an organism) instinctive or involuntary: "the spontaneous mechanical activity of circular smooth muscle" Similar reflexautomaticknee-jerkinvoluntaryunthinkingunconsciousinstinctiveinstinctualinformal:gutOpposite conscious
   • ▪ (of a plant) growing naturally and without being tended or cultivated.

   Word Origin mid 17th century: from late Latin spontaneus (from (sua) sponte ‘of (one's) own accord’) + -ous.

   Derivatives

   • 1. spontaneousness noun

   Scrabble Points: 13

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2. dictionary.cambridge.org › dictionary › englishSPONTANEOUS | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   SPONTANEOUS definition: 1. happening or done in a natural, often sudden way, without any planning or without being forced…. Learn more.

3. www.dictionary.com › browse › spontaneousSPONTANEOUS Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › spontaneous

   • Cached

   coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned: a spontaneous burst of applause. Synonyms: unpremeditated, free. Antonyms: premeditated. (of a person) given to acting upon sudden impulses.

4. www.merriam-webster.com › dictionary › spontaneousSpontaneous Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › spontaneous

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   The meaning of SPONTANEOUS is proceeding from natural feeling or native tendency without external constraint. How to use spontaneous in a sentence. Did you know? Synonym Discussion of Spontaneous.

5. dictionary.cambridge.org › us › dictionarySPONTANEOUS | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

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   SPONTANEOUS meaning: 1. happening or done in a natural, often sudden way, without any planning or without being forced…. Learn more.

6. www.vocabulary.com › dictionary › spontaneousSpontaneous - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › spontaneous

   Something spontaneous happens when you're least expecting it. Spontaneous things are natural or instinctive, and they happen without warning. If you plan to go to a movie and then you go, that's not a spontaneous thing.

7. www.thefreedictionary.com › spontaneousSpontaneous - definition of spontaneous by The Free Dictionary

   www.thefreedictionary.com › spontaneous

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   adj. 1. Happening or arising without apparent external cause; self-generated: a microorganism capable of spontaneous movement. 2. Arising from a natural inclination or impulse and not from forethought or prompting: spontaneous laughter; a spontaneous protest. 3. Unconstrained and unstudied in manner or behavior: a spontaneous personality. 4.

8. www.collinsdictionary.com › dictionary › englishSPONTANEOUS definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   Spontaneous acts are not planned or arranged, but are done because someone suddenly wants to do them. Their spontaneous outbursts of song were accompanied by lively music. I joined in the spontaneous applause. Synonyms: unplanned, impromptu, unprompted, willing More Synonyms of spontaneous.