"A record of a company’s risks." (Annetta Cortez & Bob Yehling, "The Complete Idiot's Guide® To Risk Management", 2010)
"The document containing the results of the qualitative risk analysis, quantitative risk analysis, and risk response planning. The risk register details all identified risks, including description, category, cause, probability of occurring, impact(s) on objectives, proposed responses, owners, and current status." (Project Management Institute, "Practice Standard for Project Estimating", 2010)
"Formal document and management tool that records all risks identified by the project team, along with the team’s assessment of the risks, plans to manage the risks, and progress against the plans." (Mike Clayton, "Brilliant Project Leader", 2012)
"A document in which the results of risk analysis and risk response planning are recorded." (For Dummies, "PMP Certification All-in-One For Dummies" 2nd Ed., 2013)
"A documented collection of the risks impacting an activity or organization." (Sally-Anne Pitt, "Internal Audit Quality", 2014)
"A record of information about identified risks." (David Sutton, "Information Risk Management: A practitioner’s guide", 2014)
"Formal record of identified risks." (Chartered Institute of Building, "Code of Practice for Project Management for Construction and Development" 5th Ed., 2014)
"A repository in which outputs of risk management processes are recorded." (Project Management Institute, "A Guide to the Project Management Body of Knowledge (PMBOK® Guide )", 2017
"A component that captures details of individual project risks, including a list of identified risks, potential risk owners, and potential risk responses." (Cate McCoy & James L Haner, "CAPM Certified Associate in Project Management Practice Exams", 2018)
"A document in which the iterative results of the risk identification, risk analysis, and risk response planning processes are recorded." (H James Harrington & William S Ruggles, "Project Management for Performance Improvement Teams", 2018)
"A record of information about identified risks." (ISO Guide 73:2009)