PMI Lexicon of Project Management Terms

The PMI Lexicon of Project Management Terms offers clear and concise definitions for more than 350 of the profession’s frequently used terms.

For anyone involved in portfolio, program, and project management, the Lexicon is an essential resource to foster understanding and consistent usage of terminology. Use of standardized language promotes better communications among project teams and is an essential component of any profession.

Definitions in the Lexicon were developed by volunteer experts, and PMI standards committees are chartered to use the Lexicon terms without modification.

Version 4.0 contains numerous revised terms since the last update in 2017.