spontaneous

3 definitions • 6 examples

happening or done in a natural, often sudden way, without any planning or without being forced:

His jokes seemed spontaneous, but were in fact carefully prepared beforehand.

approving She's such a spontaneous, lively woman.

happening, especially in a living thing, without being caused by something outside, or without the organism's control:

Since spontaneous remissions are common in rheumatoid arthritis, it is impossible to attribute them to any particular therapy.

Spontaneous maturation is when meiosis continues without hormonal stimulation.

happening naturally, without planning or encouragement:

a spontaneous performance

spontaneous affection