Adjective: spontaneous spón'tey-nee-us
- Happening or arising without apparent external cause
"spontaneous combustion"; "a spontaneous abortion"; "spontaneous laughter";
- self-generated
- Said or done without having been planned or written in advance
"he made a few spontaneous remarks";
- ad-lib, unwritten
See also: gut, impulsive, instinctive, instinctual, intuitive, natural, unprompted, unscripted
Encyclopedia: Spontaneous