Hi,
Employee engagement simply states the way in which an employee has these three things:
1. Inspired by their work ("I want to do this"),
2. Committed ("I am dedicated to the success of what I am doing"), and
3. Enjoys what they are doing ("I love what I am doing").
A detailed study about employee engagement is provided in the following link: [Employee engagement - Wikipedia, the free encyclopedia](http://en.wikipedia.org/wiki/Employee_engagement).
I hope this gives you a better understanding.
Regards,