- (countable) 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.
- (countable & uncountable) 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.