The PMBOK (Project Management Body of Knowledge) defines a project as follows:
A project is a temporary endeavour to create a unique product, service or result."
A project must therefore have these three characteristics / must meet these three requirements:
Example: Re-Designing a Website
Let's say you want to redesign your website. The deadline to complete the new website is 3 months. This project meets all three requirements:
An example for something that is not a project is the continuous maintenance of the website. Here the characteristics temporal limitation and uniqueness are not fulfilled, since the maintenance is a