UUID en · NOUN Meanings (abbreviation, alt-of, initialism) Initialism of universally unique identifier. alt of universally unique identifier A good example of an informationless key is a UUID (essentially a random 128 bit value, guaranteed to be unique) which is typically displayed as hex string. 2008, Marc Brevoort, Growing Better Software: Forms SpellingFeaturesLabelsSource UUIDs Number=Plur lexicographic uuid alternative lexicographic Relateds GUID · ULID