"Any request submitted by a customer (buyer or users) for a change to alter the system. These appear in various forms and include software trouble reports (STRs) and baseline change requests (BCRs). BCRs request changes to the system’s specification." (Richard D Stutzke, "Estimating Software-Intensive Systems: Projects, Products, and Processes", 2005)
"Requests to expand or reduce the project scope, modify policies, processes, plans, or procedures, modify costs or budgets, or revise schedules." (Project Management Institute, "Practice Standard for Project Estimating", 2010)
"A document requesting a change for a project." (Bonnie Biafore, "Successful Project Management: Applying Best Practices and Real-World Techniques with Microsoft® Project", 2011)
"An official document requesting modification of existing features, requirements or functions or new ones. Change Request should contain description of the current solution, justification for a change and suggested (desired) solution." (IQBBA, "Standard glossary of terms used in Software Engineering", 2011)
"An appeal to the change review board for a modification to the project by any stakeholder. The request typically includes the justification, relationship of the change to the project goal and objectives, description of the change and deliverables, and effect on project risk." (Bonnie Biafore & Teresa Stover, "Your Project Management Coach: Best Practices for Managing Projects in the Real World", 2012)
"Change management notification for change in current process/environment." (Bill Holtsnider & Brian D Jaffe, "IT Manager's Handbook" 3rd Ed, 2012)
"A formal proposal to modify any document, deliverable, or baseline." (For Dummies, "PMP Certification All-in-One For Dummies" 2nd Ed., 2013)
"1. Written request or proposal to perform a specific change for a development product or to allow it to be implemented. 2. A request to change some software artifact due to a change in requirements." (Tilo Linz et al, "Software Testing Foundations" 4th Ed, 2014)
"Change management notification for a change in current process/environment." (Bill Holtsnider & Brian D Jaffe, "IT Manager's Handbook" 3rd Ed", 2012)