Definition of project with reference?

A project is a temporary endeavor undertaken to create a unique product, service, or result. It is characterized by a specific objective, a defined timeline, and allocated resources. Projects are typically carried out by teams or individuals and involve a series of coordinated activities to achieve the desired outcome.

Reference:
Project Management Institute. (2017). A Guide to the Project Management Body of Knowledge (PMBOK® Guide) – Sixth Edition. Project Management Institute.