a. | 1. | Proceeding from natural feeling, temperament, or disposition, or from a native internal proneness, readiness, or tendency, without constraint; | ||||||
2. | Proceeding from, or acting by, internal impulse, energy, or natural law, without external force; | |||||||
3. | Produced without being planted, or without human labor;
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Adj. | 1. | spontaneous - happening or arising without apparent external cause; "spontaneous laughter"; "spontaneous combustion"; "a spontaneous abortion" Synonyms: self-generated Antonyms: induced - brought about or caused; not spontaneous; "a case of steroid-induced weakness" |
2. | spontaneous - said or done without having been planned or written in advance; "he made a few ad-lib remarks" | |
3. | spontaneous - produced without being planted or without human labor; "wild strawberries" Synonyms: wild |