Dictionary meaning of bounce rate is the percentage of visitors to a particular website that leave the website only after viewing one page.
Often the terms bounce rate and exit rate are used interchangeably but they are a little different from each other.
Bounce rate as we know measure the percentage of people who leave website after visiting one page whereas Exit rate measures people exiting from website from a specific page.
Bounce rate is calculated as the total number of one page visits divided by the total number of visits on the website.