The bounced visits (or bounce rate) metric tells you the amount (or ratio) of visitors that landed on the website and left, without taking any other action, suggesting either the content was irrelevant or unattractive, or that we’re attracting the wrong visitors.
In Google Analytics, a “bounced” visit is counted when there is no additional pageview or event tracked after the landing.
Depending on the case, you might want to adjust the logic for telling GA when a visit is (not) bounced, by triggering an event upon an interaction inside the page. Here a a few examples:
One word of advice: Use additional events cautiously, in order to not exceed the hits limit (10 Million hits per month, 500 hits per session). E.g. scroll-triggered events should be called once per page, and not with every scroll.