A composite print is a viewing print with sound and image. It is a positive film with both picture and corresponding sound on the same film, which may be in editorial or projection synchronism.
A composite release print is a print with both picture and sound records in projection synchronism on the same film.
References
SMPTE, 1964, SMPTE Nomenclature for Motion Picture Film used in Studios and Processing Laboratories, Society of Motion Picture and Television Engineers, USA