Noun
1. a band that fits around the neck and is usually folded over
2. a band of leather or rope that is placed around an animal's neck as a harness or to identify it
3. necklace that fits tightly around a woman's neck
4. a figurative restraint;
"asked for a collar on program trading in the stock market""kept a tight leash on his emotions""he's always gotten a long leash"5. the act of apprehending (especially apprehending a criminal);
"the policeman on the beat got credit for the collar"