A collar is something which goes around the neck of a person, animal, or thing (such as a bottle). Specifically, collar may mean: Collar (clothing), the part of a garment that fastens around or frames the neck. Collar (animal), a strap for an animal's neck to which a leash or harness may be attached. Collar (BDSM), a device of any material placed around the neck of the submissive partner in BDSM. Collar (jewelry), an ornament for the neck, especially a close-fitting necklace popular in the Ed… (More on Collar)