I want to know meaning of bounce rate and how I can make it low in my website?

The bounce rate calculation for a page is based only on visits that start with that page.

Bounce rate is something when visitors visit your site and bounce back without even visiting any other pages.

The bounce rate is the percentage of visitors who leave your site after viewing only one page.
People can bounce away from your site by:
    clicking on an external link to a different website
    clicking the 'back' button to leave the website
    closing the browser or tab
    typing in a new URL.
You can decrease Bounce rate  by making Your website attractive the right kind of audience, who are clicking through to your other pages of content, which means there's a good chance they'll convert.

Bounce Rate is a percentage of visitors which exit from the site without browsing the site or do not pass a certain amount of time on the site.

Bounce rate is the measurement in percentage of how many Web site visitors view only one page within your Web site.If you have a high bounce rate and want to bring it down, examine your site's usability issues.First look at your site and to clean up any usability and navigation problems that are asking people to leave.And also Long, ranting copy and a lack of attractive graphics will keep your bounce rates high.