Definitions
1.AdjectiveSelf-generated; happening without any apparent external cause."He made a spontaneous offer of help.; To make a spontaneous decision"
2.AdjectiveDone by one's own free choice, or without planning.
3.AdjectiveProceeding from natural feeling or native tendency without external or conscious constraint.
4.AdjectiveArising from a momentary impulse.
5.AdjectiveControlled and directed internally; self-active; spontaneous movement characteristic of living things.
6.AdjectiveProduced without being planted or without human cultivation or labor.
7.AdjectiveSudden, without warning.
8.AdjectiveSaid or done without prior planning or prior writing."He made a spontaneous remarks in the court."