Impromptu

Done without planning; something that happens suddenly and unexpectedly, like a surprise party or a last-minute decision with friends.

Examples

• During our school assembly, the principal announced an impromptu talent show, encouraging students to showcase their skills right then and there, which led to some amazing and unexpected performances.
• After finishing our science project early, my friends and I decided to have an impromptu debate about the best superhero, which turned into a lively discussion filled with laughter and excitement.
• When we arrived at the picnic, we discovered that the park was hosting an impromptu concert, and we all danced and sang along to the music, making it a day to remember.

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