The extent to which it is possible to establish equivalence between the level and content of formal qualifications (certificates or diplomas) at sectoral, regional, national or international levels.
Source: CEDEFOP 2008, Europe

Determined for the purpose of pegging qualifications to a qualifications framework based on a wide range of criteria including purpose, specifications and characteristics of the qualification, high level learning outcomes in relation to level descriptors, credits, and quality assurance arrangements
Source: SADC 2011, Southern Africa

(Comparability) The comparison of one qualification with another based on high-level criteria that enable the degree of similarity of the qualification to be established by a non-subject matter expert (Comment: Comparability is a more generic form of evaluation, i.e. at a level that does not require subject matter experts, typically performed by a national information centre)
Source: UNESCO 2015, Global