dog collar

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A collar for a dog.
• noun Informal A clerical collar.
• noun A choker.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A collar for a dog
• noun informal a clerical collar
• noun A close-fitting woman's necklace; a choker

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a stiff white collar with no opening in the front; a distinctive symbol of the clergy
• noun a collar for a dog
• noun necklace that fits tightly around a woman's neck