Englishfor English speakers
successful
Adjective
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If you are successful, you are effective at something.
The successful business man knows how to get money for his work.
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If you have done something right, you are successful.
The cook was successful when she made the best pepperoni pizza in town.
performance
Noun
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A performance is a show of acting or music.
We went to see a performance by local musicians last night.
The acting was good, but the noise made it difficult to enjoy the performance.
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The performance of a person, machine, company, etc. is how well it does its job.
After a year of losing money, the company needs to improve performance.
This car is a high performance vehicle.