| 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 | ||