: not prepared ahead of time : made or done without preparation Two of my friends came by unexpectedly, and we had an impromptu little party in my kitchen. He made an impromptu speech about honor and responsibility.

What is the best definition of impromptu?

The definition of impromptu is something done without advance thought or without a plan. ... Without preparation or advance thought; offhand.

What is the other term of impromptu?

impromptu. improvised. impulsive. made-up. off-the-cuff.