Definition of Spontaneous
happening naturally, without a plan or thought
Use Spontaneous in a sentence
The crowd burst into spontaneous applause when the Queen appeared on the balcony.
He never does anything spontaneously, everything has to be planned ahead of time.
A spontaneous protest that turns violent is harder to predict and respond to.
But some preterm births are spontaneous and impossible to avoid.
the US consulate attack was simply a spontaneous reaction to a YouTube video.
The Princess’ spontaneous gesture of hugging the AIDS patient was very touching.
The questions and probing were spontaneous and always in relation to the music experience.
Thousands of people spontaneously poured into the streets of the capital to celebrate after the victory of the national soccer team in the World Cup.
I really liked the young children’s spontaneous vocalizations in a free play.
Jones said he believed her because her report was so spontaneous.
They broke out into spontaneous laughter.