Simple Definition:
Passion is a strong and intense feeling or emotion. It is a deep enthusiasm and dedication towards something or someone. People who have passion are highly motivated and driven to pursue their interests and goals. For example, someone who is passionate (has passion) about music may spend hours practicing an instrument or attending concerts.
Very Simple Definition:
Passion is a very strong feeling about something. It is when you really like something a lot and it makes you want to do it all the time. For example, if you love playing soccer and you always want to play and practice every day, then you have a passion for soccer.