Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adverb: spontaneously  spón'tey-nee-us-lee
  1. In a spontaneous manner
    "this shift occurs spontaneously"
     
  2. Without advance preparation
    "he spoke spontaneously";
    - ad lib, ad libitum, impromptu

Encyclopedia: Spontaneously