dog collar

noun

1. a collar used to restrain or identify a dog.
2. Informal. a close-fitting necklace, as a wide band covered with or composed of precious or semiprecious stones; choker.
3. Slang. a collar of the type worn by some clergymen, priests, etc., having the opening at the back; clerical collar.

noun

1. a collar for a dog
2. an informal name for a clerical collar
3. informal a tight-fitting necklace