This is traffic to your website that matches what the user was looking for. In other words, if they were doing a search for a bat and they landed on a page about the animal and that is what they were searching for then that would be qualified traffic. However, if they were searching for a bat for baseball and ended up on a page about an animal then this would not be qualified traffic.
Words spelled the same way but have different meanings are called homonyms and this should be taken into consideration when doing keyword research.