|  | 
Definition of Spontaneously
1. Adverb. In a spontaneous manner. "This shift occurs spontaneously" 
Partainyms: Spontaneous
2. Adverb. Without advance preparation. "He spoke ad lib"
Definition of Spontaneously
1. [adv]
|  | 
1. Adverb. In a spontaneous manner. "This shift occurs spontaneously" 
1. [adv]