In a spontaneous manner; naturally; voluntarily.

Self-generated; happening without any apparent external cause. / Done by one's own free choice, or without planning.

(uncountable) The quality of being spontaneous. / (countable) Spontaneous behaviour.

The state or condition of being spontaneous; spontaneity.

plural of spontaneity

(politics) The belief that a revolution should arise spontaneously.

Misspelling of spontaneous.

(pathology) A pulmonary condition resulting in the collection of air within the chest, which occurs absent traumatic injury. Spontaneous Pneumothorax are considered a medical emergency, generally requiring assistive radiographic evaluation to determine the extent of lung collapse, as well as determine the most appropriate course of emergency medical treatment for the patient. Abbreviated as SP.

Combustion without an external source of heat.

plural of spontaneous abortion