Pick the best definition of quality:

Quality is best defined as "conformance to requirements" because it captures the essence of what quality means in a testing and development context. It emphasizes that for a product or service to be considered high quality, it must meet the specified requirements and standards that have been established. This definition aligns with the principles of measurement in testing, where outcomes are evaluated against predefined expectations or specifications.

By focusing on conformance to requirements, it becomes clear that quality assurance processes are aimed at ensuring that all product features and functions fulfill the criteria set during requirement gathering. This definition is comprehensive and universally applicable across various industries, highlighting that true quality is determined not just by the absence of defects or failures, but by the actual fulfillment of stakeholder needs and requirements.