Synonym: ad lib, ad libitum, ad-lib, extemporaneous, extemporary, extempore, off-the-cuff, offhand, offhanded, spontaneously, unrehearsed. Similar words: prompt, compromise, uncompromising, improper, improved, improvise, improvised, improbable. Meaning: [ɪm'prɑmptuː /-'prɒmptjuː] 
n. 1. an extemporaneous speech or remark 2. a short musical passage that seems to have been made spontaneously without advance preparation. adj. with little or no preparation or forethought. adv. without advance preparation.
n. 1. an extemporaneous speech or remark 2. a short musical passage that seems to have been made spontaneously without advance preparation. adj. with little or no preparation or forethought. adv. without advance preparation. 
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1. The announcement was made in an impromptu press conference at the airport.
2. This afternoon the Palestinians held an impromptu press conference.
3. I'm sure his remarks were rehearsed, not impromptu.
4. A piece of impromptu spiced up the concert.
5. They often held impromptu meetings in their house.
6. The band gave an impromptu concert on the roof of the studio.
7. Jem's impromptu speech met with thunderous applause.
8. His digital likeness won an impromptu cyber-fight against a Lennox Lewis character by a knockout in the fourth round.
9. Bland statements by officials are replaced by impromptu briefings by the prime minister himself.
10. We finished the day with an impromptu game of football in a nearby field.
11. He also gives shoppers impromptu shows in Oxford's High Street.
12. From that point, the forum became an impromptu tribute to Jim Maier.
13. Few people look at the bright side of impromptu, outdoor conversations with hibernating neighbors.
14. It was interesting to see the many impromptu sketches made insitu, often as skilled as the finished work.
15. Lord Fitzwilliam gave an impromptu ball for her at Milton Park and she danced until dawn.
16. His impromptu striptease took place while the band were making a ￡30,000 promo for the hit.
17. This is made abundantly clear at our first impromptu committee meeting in the bar of the Gardener's Arms.sentencedict.com
18. Then an impromptu meeting, on the model of what had happened in Dungannon, was held.
19. It wasn't that good, but impromptu insults are seldom well crafted.
20. Before me were the remains of an impromptu wedding breakfast.
21. I quite by chance got drawn into a kind of impromptu party downstairs.
22. Iris borrowed beds from friends and turned the attic into an impromptu dormitory.
23. Fujimori said previous radio contacts broke off after the guerrillas held an impromptu news conference, disrupting negotiations up to that point.
24. One 200-strong theatre audience who found themselves trapped in the chaos on Tuesday were given an impromptu hour-long concert by Tom Jones.
25. The remarks of both Clintons were, at least in part, impromptu.
26. We browse through my cookbooks, perusing recipes, not as formulas or prescriptions but as hints and inspirations for impromptu inventions.
27. But in the final hour he did deliver the goods, taking impromptu questions from the audience.
28. As an afterthought, engineer Ray Tomlinson adapted this program so people could also send short, impromptu messages over the network.
29. The script was treated with creative neglect, the acting embellished with impromptu flourishes and stumbles.
30. He had failed because of a lack of talent for impromptu speaking, considered essential for the task he was contemplating.
More similar words: prompt, compromise, uncompromising, improper, improved, improvise, improvised, improbable, improbably, improvement, improvident, improvisation, sumptuous, presumptuous, contemptuous, contemptuously, exempt from, comprise, compress, impress, imprint, romp, imprison, compressor, comprehend, comptroller, imprudent, imprisoned, imprecise, compression.