OCN en · NOUN Meanings (abbreviation, alt-of, initialism) Initialism of OCLC control number. alt of OCLC control number (abbreviation, alt-of, initialism) Initialism of offense cycle number (“a unique tracking number used in the criminal justice system in order to follow the progression of a case”). alt of offense cycle number (abbreviation, alt-of, initialism) Initialism of original camera negative. alt of original camera negative Forms SpellingFeaturesLabelsSource OCNs Number=Plur lexicographic