- Proceding from natural feeling, temperament, or
disposition, or from a native internal proneness, readiness, or
tendency, without constraint; as, a spontaneous gift or proportion. - Proceeding from, or acting by, internal impulse,
energy, or natural law, without external force; as, spontaneous motion;
spontaneous growth. - Produced without being planted, or without human
labor; as, a spontaneous growth of wood.
Meaning of 'spontaneous' (Princeton's WordNet)
1 . spontaneous
[ a]
Meaning (1): - happening or arising without apparent external cause
Example in sentence:
a spontaneous abortion;
spontaneous combustion;
spontaneous laughter
2 . spontaneous
[ s]
Meaning (2): - said or done without having been planned or written in advance
Spontaneous recovery Spontaneous recovery the reemergence of an extinguished conditioned response after a period of rest and with no further conditioning.