English adjective: spontaneous | |||
1. | spontaneous happening or arising without apparent external cause | ||
Samples | Spontaneous laughter. Spontaneous combustion. A spontaneous abortion. | ||
Synonyms | self-generated | ||
Similar | impulsive, instinctive, intuitive, natural, unprompted | ||
Antonyms | induced | ||
2. | spontaneous said or done without having been planned or written in advance | ||
Samples | He made a few ad-lib remarks. | ||
Synonyms | ad-lib, unwritten | ||
Similar | unscripted | ||
Antonyms | scripted, written | ||