from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A chain collar that tightens like a noose when the leash is pulled, used to train or control dogs or other animals.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A dog's
collarwhich tightens itself so as to choke the dog, when it pulls the leash. Used especially for training.
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