The totality of features and characteristics of a product or service that bear on its ability to satisfy stated or implied needs. [2: 1.1.2]

All those planned and systematic actions necessary to provide adequate confidence that a product, process, or service will satisfy given requirements for quality. [2: 1.1.4]

A systematic and independent examination to determine whether quality activities and related results comply with planned arrangements and whether these arrangements are implemented effectively and are suitable to achieve objectives. [3: 4.9]

Operational techniques and activities that are used to fulfil requirements for quality. [2: 1.1.5]

Any relative quality measure obtained by comparing observed values with the relevant requirements. Notes:
(1) Usually a numerical value indicating either the degree of conformity or nonconformity, especially for specification or sampling inspection purposes.
(2) Where possible, a more precise term should be used, e.g. 'proportion conforming', 'fraction nonconforming', 'acceptable quality level'. [2: 1.1.8]

all activities of the overall management function that determine the quality policy, objectives and responsibilities, and implement them by means such as quality planning, quality control, quality assurance and quality improvement within the quality system. [3: 3.2]

The organizational structure, responsibilities, procedures, processes, and resources for implementing quality management., [3: 3.6].